Getting Into or Staying Out of Federal Court: A Practical Guide to Jurisdiction and Removal

At 4:40 on a Friday afternoon, a process server walks into the lobby of a family-owned pump manufacturer outside Milwaukee and hands the receptionist an envelope from an Illinois county court. The company's outside lawyer reads the complaint that evening. By Monday she needs an answer to a question that sounds simple: do we want to be in this court? She has 30 days to act on it. The deadline cannot be stretched for equitable reasons, as the Supreme Court confirmed in 2026. If she removes, she may have only seven more days to respond in federal court. If she guesses wrong about one co-defendant's ownership, she could try the case and win, only to have the win vacated on appeal.

The plaintiff's lawyer made his own forum decisions weeks earlier, which is why the pleading names a local distributor, mentions no federal statute, and carefully avoids a dollar figure. Almost everything that decides where this case will be heard happens in the first few weeks, usually before anyone has thought hard about the merits.

This guide takes those decisions in sequence. The doctrine behind them is in the companion article, Federal Subject-Matter Jurisdiction: Arising Under, Diversity, Supplemental Claims, and the Defect That Never Waives. The forms are in the Federal Jurisdiction Toolkit: Notices of Removal, Remand Motions, and Jurisdictional Allegations, and a desk version of the steps is in the Federal Jurisdiction and Removal Checklist: A Practical Checklist.

The short answer

If you are the plaintiff:

• Decide on a forum first, then plead to it. Your complaint is the main control you have.
• To be in federal court, plead a real federal claim or genuinely complete diversity, with every LLC member's citizenship traced and a Rule 7.1 statement ready.
• To stay in state court, plead only state claims, join a real nondiverse defendant with specific facts, or sue for less than the threshold, and serve any forum defendant immediately.
• If you are removed and want out, calendar 30 days from the notice for every procedural defect. A jurisdictional defect can wait, but your position weakens if it does.
• A federal-claim plaintiff can usually get back to state court by deleting the federal claims. Royal Canin U.S.A., Inc. v. Wullschleger, 604 U.S. 22 (2025), makes the result mandatory, though that decision has costs of its own.

If you are the defendant:

• Calendar the 30-day clock the day you are served. After Enbridge Energy, LP v. Nessel, No. 24-783 (U.S. Apr. 22, 2026), there is no equitable rescue for an ordinary late removal.
• Check four gates before anything else: a basis for original jurisdiction, consent of all served defendants, the forum-defendant rule, and the one-year limit.
• Allege citizenship on facts you have verified. You carry the burden.
• If your diversity depends on improper joinder, weigh what happens after you win. Under Hain Celestial Group, Inc. v. Palmquist, No. 24-724 (U.S. Feb. 24, 2026), a wrong joinder ruling can erase a later judgment in your favor. Ask for early appellate review.
• Do not remove a claim you plan to attack for lack of Article III standing, unless you are happy to end up back in state court.

Step 1: Decide which court you actually want

Lawyers tend to treat this as instinct. It deserves ten minutes of real analysis, because the choice will cost money either way, and because the answer is not always federal court for defendants or state court for plaintiffs. For the wider forum picture, including transfer and forum clauses, see Moving or Keeping a Case in Your Chosen Forum: A Practical Guide.

A few considerations are less obvious. A removal can backfire on standing, as described in Step 5. A plaintiff with a weak federal claim should ask whether it is worth carrying, since it hands the defendant a route out of state court. A defendant with a strong federal defense may find a sophisticated state trial court perfectly capable; a federal defense does not support removal anyway, under Caterpillar Inc. v. Williams, 482 U.S. 386 (1987). And the cost of being wrong differs. A plaintiff who loses a remand fight spends some money. A defendant who wins a remand fight on a shaky ground may spend several years of money on a judgment that does not hold. Neither side should measure this only by the expected ruling on the motion.

Step 2: Build the citizenship file before you make a filing

Diversity questions are questions of fact on a specific date. You can often answer them with a modest amount of work at the beginning. Late answers can cost a whole case. Both sides need the same file.

Who does this: an associate or paralegal gathers it, the signing lawyer reviews it, and a client contact confirms it in writing. When: before the complaint for a plaintiff, and during the first week after service for a defendant.

Individuals. Citizenship is domicile, meaning physical presence plus intent to remain. An allegation of "residence" is wrong on its face, as courts repeat in cases like Heinen v. Northrop Grumman Corp., 671 F.3d 669 (7th Cir. 2012). Collect where the person lives, votes, pays state income tax, holds a driver's license, and keeps family ties. A party who recently moved requires extra care, because the question is fixed on the filing date, not today. For someone with homes in two states, a court asks which one the person really treats as home, and paper changes made for other reasons may not move the answer, as the Seventh Circuit's discussion in Galva Foundry Co. v. Heiden, 924 F.2d 729 (7th Cir. 1991), shows.

Corporations. Record the state of incorporation, and then the nerve center: where senior officers actually direct the company. Hertz Corp. v. Friend, 559 U.S. 77 (2010), rejects a bare 10-K address as proof. For a remote-first company, write down where the CEO and senior team actually sit when making decisions.

LLCs, partnerships, and unincorporated entities. List every member. For each member that is an entity, list its members, and keep going until you reach a human being or a corporation. Limited partners count under Carden v. Arkoma Associates, 494 U.S. 185 (1990). Shareholders of a state-law real estate investment trust count under Americold Realty Trust v. ConAgra Foods, Inc., 577 U.S. 378 (2016). Date the list to the filing date and, for a removed case, the removal date.

Trusts and estates. A traditional trust usually takes its trustee's citizenship. An estate's representative takes the decedent's, under 28 U.S.C. § 1332(c)(2). A direct action against a liability insurer has its own wrinkle in § 1332(c)(1).

Where the information comes from. Your own client should be the first source, and a written certification from the client is cheap insurance. For an adversary, start with secretary of state records, SEC filings, and any disclosure statements the entity filed in earlier lawsuits. PACER search results often contain a prior Rule 7.1 statement for the same entity. Then ask. A short letter asking counsel to identify the LLC's members and their citizenship costs nothing and sometimes gets an answer.

If the information is unavailable, Lincoln Benefit Life Co. v. AEI Life, LLC, 800 F.3d 99 (3d Cir. 2015), allows a plaintiff to plead on information and belief, after reasonable inquiry, that no member shares its citizenship. The Third Circuit's point was that a plaintiff need not plead what it cannot know; it must have looked. Not every circuit has adopted that approach in terms, and the Seventh's line of cases, such as Thomas v. Guardsmark, LLC, 487 F.3d 531 (7th Cir. 2007), demands identification of each member. Check your circuit before relying on it.

Step 3: If you are the plaintiff, plead to your forum

3A: Getting into federal court

Federal question. Plead a claim that federal law creates. That is enough to satisfy 28 U.S.C. § 1331, unless the claim is so insubstantial that it fails under Bell v. Hood, 327 U.S. 678 (1946). Do not rest on a federal issue buried in a state claim unless you can satisfy the four-part test of Gunn v. Minton, 568 U.S. 251 (2013); that road is narrow, and few claims pass. Add related state claims under 28 U.S.C. § 1367(a), keeping in mind that the court can decline them if the federal claim falls away. Check whether the claim is exclusively federal, as patent and copyright infringement are under 28 U.S.C. § 1338(a), or whether you have a choice, as with trademark, Defend Trade Secrets Act, and Computer Fraud and Abuse Act claims. For how those last two tend to get pleaded, see Bringing or Defending a Civil Computer Fraud and Abuse Act Claim: A Practical Guide and Onboarding a Competitor's Employee Without Importing Its Secrets: A Practical Guide.

Diversity. You need complete diversity and more than $75,000 exclusive of interest and costs. Allege citizenship rather than residence, name every member of each LLC, and state a good-faith amount. Under St. Paul Mercury Indemnity Co. v. Red Cab Co., 303 U.S. 283 (1938), your number controls unless it appears to a legal certainty that the claim is really for less. Aggregate claims of a single plaintiff against a single defendant. If you add co-plaintiffs with smaller claims, Exxon Mobil Corp. v. Allapattah Services, Inc., 545 U.S. 546 (2005), lets them come along so long as one plaintiff meets the amount and complete diversity holds.

Sample allegation for a plaintiff facing an LLC.

Plaintiff is a corporation organized under Illinois law with its principal place of business in Peoria, Illinois, where its senior officers direct and control its operations. Defendant Graywacke Holdings, LLC is a Delaware limited liability company. On information and belief, formed after a review of Delaware and Nevada corporate filings and Defendant's disclosure statement in [prior case and docket number], Graywacke Holdings' sole member is a Nevada corporation with its principal place of business in Reno, Nevada, and no member of Graywacke Holdings is a citizen of Illinois.

Rule 8(a)(1) requires a short and plain statement of the grounds for jurisdiction, and these details are what make the statement honest. The name of that prior case gives the court a reason to credit it, and it records the inquiry that Rule 11 requires.

The Rule 7.1 statement. In a § 1332(a) case, Fed. R. Civ. P. 7.1(a)(2) requires every party to file a statement with its first appearance naming and giving the citizenship of everyone whose citizenship is attributed to it, and to supplement it if a later event could affect jurisdiction. Use it offensively. If the other side's statement is thin, raise it early. Some courts issue show-cause orders on this point themselves, so it is better to have your own house in order.

3B: Staying in state court

Plaintiffs have legitimate tools here, and the courts say so. "The plaintiff is 'the master of the complaint,'" Royal Canin reminds us, and may decide which claims to bring against which defendants, including adding a local defendant for the purpose of avoiding federal court. What a plaintiff cannot do is lie about it, or join someone against whom there is no real claim.

Plead only state-law claims, and do not cite federal statutes as an element where you can avoid it. A claim that depends on a federal standard invites a Grable removal; an alternative state-law theory defeats the "necessarily raised" factor under Christianson v. Colt Industries Operating Corp., 486 U.S. 800 (1988). Watch for complete preemption, under which a state-law label will not save a claim that falls within § 301 of the Labor Management Relations Act or ERISA § 502(a), as in Aetna Health Inc. v. Davila, 542 U.S. 200 (2004). Read your pleading as a removal lawyer would.

Join a real nondiverse defendant, and plead specifics. The Palmquists won at the Supreme Court because the Fifth Circuit found they had plausibly alleged a Whole Foods misrepresentation, which is a reminder that the effort spent on the local-defendant allegations can decide the forum. Describe what that defendant did, when, and why state law makes it liable. A complaint that lumps it into "Defendants" gets into trouble. A note of caution: if you join someone and then quietly abandon the claim before the year runs, you risk a bad-faith finding under 28 U.S.C. § 1446(c)(1), as happened in Hoyt v. Lane Construction Corp., 927 F.3d 287 (5th Cir. 2019).

Sue a forum defendant, and serve fast. If complete diversity exists but a defendant is a citizen of the forum state, 28 U.S.C. § 1441(b)(2) bars removal once that defendant is "properly joined and served." Service is therefore a race, and the Second, Third, and Fifth Circuits let the other side win it. Arrange service in advance: a process server at the registered agent's door as soon as the clerk stamps the complaint, or a pre-signed waiver if counsel has authority. Do not rely on an agreement to accept service. In Encompass Insurance Co. v. Stone Mansion Restaurant Inc., 902 F.3d 147 (3d Cir. 2018), a defense lawyer who had agreed to accept service told plaintiff's counsel that service would need to wait until after removal, and the removal stood. A cheap protection is to pick a state and time of filing that let you serve immediately. Some states require a delay between filing and service, and the Second Circuit accepted the resulting state-by-state variation, naming Delaware as an example, in Gibbons v. Bristol-Myers Squibb Co., 919 F.3d 699 (2d Cir. 2019).

Sue for less, in writing. St. Paul Mercury explicitly accepts this: a plaintiff who does not want federal court "may resort to the expedient of suing for less than the jurisdictional amount, and though he would be justly entitled to more, the defendant cannot remove." The limit must be real. Many states let a plaintiff recover more than the amount pleaded, and under § 1446(c)(2) a defendant may then assert a higher number. The common answer is a sworn, binding stipulation filed with the complaint that the plaintiff will neither seek nor accept more than $75,000. A post-removal stipulation usually comes too late for amount purposes, as Royal Canin's footnote 8 preserves. Class plaintiffs have an additional problem under Standard Fire Insurance Co. v. Knowles, 568 U.S. 588 (2013), since a named plaintiff cannot bind absent class members before certification; see Removing or Remanding a Class Action Under CAFA: A Practical Guide.

Use the forum clause. If the contract has one, read its words. A clause choosing the courts "of" a state may exclude federal courts located there, as in FindWhere Holdings, Inc. v. Systems Environment Optimization, LLC, 626 F.3d 752 (4th Cir. 2010).

Calendar the one-year date. The one-year bar applies only to later-arising diversity removals under § 1446(b)(3), and the bad-faith exception can pierce it, but it often remains the most useful date on your calendar. Do not trade a nondiverse defendant away until you have thought about it.

A worked example for the plaintiff's side

Suppose Marisol Quant, who runs a bakery chain in Amarillo, Texas, wants to sue over a failed point-of-sale rollout in New Mexico state court, where the deal was negotiated. Her Texas LLC has two members, both domiciled in Texas. The defendants are the California vendor and Rio Pecos Register, a New Mexico reseller. Damages are about $400,000.

Diversity is complete: Texas on one side, California and New Mexico on the other. So the only thing keeping the case in state court is the forum-defendant rule, and that protection attaches only when Rio Pecos Register has been "properly joined and served." If the California vendor has a docket alert and files a notice of removal before service, the plaintiff faces a snap removal.

Quant's counsel should have a process server standing by at the reseller's registered agent. The complaint is e-filed at 9:00 a.m., the clerk accepts it at 11:20 a.m., and service occurs at 11:45 a.m. Counsel files proof of service that afternoon. If the vendor's notice of removal arrives at 11:30 a.m. anyway, she moves to remand within 30 days, arguing the unsettled law in her circuit if there is no controlling decision, and keeps an alternative plan: a voluntary dismissal under Fed. R. Civ. P. 41(a), by notice if no defendant has answered and by court order if one has, followed by refiling and same-day service. That is the sequence the Eleventh Circuit declined to disturb in Goodwin v. Reynolds, 757 F.3d 1216 (11th Cir. 2014). Her lawyer should also confirm that the new action would be timely. And her counsel should remember the limit: snap removal cannot cure a true lack of complete diversity, as M & B Oil, Inc. v. Federated Mutual Insurance Co., 66 F.4th 1106 (8th Cir. 2023), held. If a New Mexico citizen were on the plaintiff side, she would not need to race at all.

Step 4: If you are the defendant, run the 30-day plan

Day 0: Fix the date and freeze the state court

Determine exactly when the 30 days began. Murphy Brothers, Inc. v. Michetti Pipe Stringing, Inc., 526 U.S. 344 (1999), holds that the clock runs from formal service, so a courtesy copy or emailed complaint should not start it. Under § 1446(b)(2)(B), each defendant has its own 30 days. Use Fed. R. Civ. P. 6(a) to count, and then build in a margin; treat day 25 as your target.

Do not make a substantive move in state court without thinking first. Filing a required response usually will not waive removal, and Yusefzadeh v. Nelson, Mullins, Riley & Scarborough, LLP, 365 F.3d 1244 (11th Cir. 2004), held that a motion to dismiss filed in compliance with state deadlines, with no ruling obtained, did not take "substantial offensive or defensive actions." A motion you push to decision is another matter, and it invites a waiver argument. Check existing orders too. A state court TRO or injunction entered before removal stays in effect, but only as long as it would have under state law, under 28 U.S.C. § 1450 and Granny Goose Foods, Inc. v. Brotherhood of Teamsters, 415 U.S. 423 (1974). Removing does not waive personal jurisdiction or other Rule 12 defenses, as Danziger & De Llano, LLP v. Morgan Verkamp LLC, 948 F.3d 124 (3d Cir. 2020), confirms; the defenses travel with the defendant.

Days 1 to 5: Ask whether a federal basis exists

Work through the possible grounds, in this order.

Is there a federal claim on the face of the complaint? If yes, removal under § 1441(a) is straightforward. If the complaint mixes federal claims with unrelated state claims outside supplemental jurisdiction, § 1441(c) requires the court to sever and remand the unrelated ones.

Is there an embedded federal issue? Test it honestly against all four Gunn factors. Be skeptical of your own theory. Most ordinary state-law claims that happen to involve federal standards do not qualify, under Merrell Dow Pharmaceuticals Inc. v. Thompson, 478 U.S. 804 (1986). The tax-title dispute in Grable & Sons Metal Products, Inc. v. Darue Engineering & Manufacturing, 545 U.S. 308 (2005), is a narrow model. An unsuccessful Grable removal also carries fee risk.

Is the claim completely preempted? Only a few federal statutes qualify. Everything else is a defense for later.

Is there complete diversity and more than $75,000? Use your citizenship file. For amount, § 1446(c)(2) and Dart Cherokee Basin Operating Co. v. Owens, 574 U.S. 81 (2014), let the notice rest on a plausible allegation, but gather the support now, because a challenge shifts you to proving it by a preponderance. Typical support: a demand letter, medical bills, contract value, fee-shifting provisions, a declaration from someone who ran the numbers.

Is there a specialized path? 28 U.S.C. § 1442 covers federal officers and those acting under them, with a broad "relating to" test confirmed in Chevron USA Inc. v. Plaquemines Parish, No. 24-813 (U.S. Apr. 17, 2026). 28 U.S.C. § 1454 covers patent, plant variety, and copyright claims, including those asserted by counterclaim, by any party, with extendable time. Class actions fall under CAFA, for which the CAFA Removal and Remand Checklist: A Practical Checklist and CAFA Toolkit: Notices of Removal, Jurisdictional Evidence, and Exception Briefing apply.

Does a statute forbid removal? Check 28 U.S.C. § 1445. Check for a forum clause waiver too. And only an original defendant may remove under § 1441(a). A third-party counterclaim defendant cannot, under Home Depot U.S.A., Inc. v. Jackson, 587 U.S. 435 (2019), so any party in that position should look at § 1454 or stop.

Days 5 to 10: Walk through the consent and forum-defendant gates

Consent. If removal rests only on § 1441(a), every properly joined and served defendant must join or consent, under § 1446(b)(2)(A). Check the state docket, then the other defendants' counsel, as to who has been served. An unserved defendant's consent is not needed, but it may be useful anyway. The safest form is a separate signed consent, or a joinder signed by counsel, filed within the 30 days. The Fourth, Sixth, Eighth, and Ninth Circuits have accepted a notice representing that the others consent, in cases like Mayo v. Board of Education of Prince George's County, 713 F.3d 735 (4th Cir. 2013), Harper v. AutoAlliance International, Inc., 392 F.3d 195 (6th Cir. 2004), Griffioen v. Cedar Rapids & Iowa City Railway Co., 785 F.3d 1182 (8th Cir. 2015), and Proctor v. Vishay Intertechnology Inc., 584 F.3d 1208 (9th Cir. 2009). The Fifth requires "some timely filed written indication from each served defendant" under Getty Oil Corp. v. Insurance Co. of North America, 841 F.2d 1254 (5th Cir. 1988). Do not assume a late cure will work: in Taylor v. Medtronic, Inc., 15 F.4th 148 (2d Cir. 2021), a served defendant who thought it had not been served could not cure by opposing remand after the period expired, and the Second Circuit vacated the dismissal the defendants had won and sent the case back. Defendants that may be improperly joined do not need to consent, but the notice should say why, and it would be prudent to request consent anyway.

The forum-defendant rule. If removal rests only on diversity and any properly joined and served defendant is a forum citizen, you cannot remove. If that defendant has not yet been served, you may be able to. This is snap removal, and whether to attempt it deserves a real conversation.

• Check your circuit. It is permitted on the text in the Second, Third, and Fifth. The Eleventh's language in Goodwin is unfriendly. The Eighth has left it open, and many district courts are divided.
• Do not jump the gun. In Casola v. Dexcom, Inc., 98 F.4th 947 (9th Cir. 2024), a notice filed after an e-filing submission but before the California clerk processed the complaint was a legal nullity. Check that a case number and official filing date exist. If your docket vendor reports a filing, verify it against the court's own record.
• Do not break a promise. If counsel has agreed to accept service, tell the other side what you are doing. Encompass tolerated a disclosed maneuver, and courts remember gamesmanship when they consider fees and discretionary relief.
• Be sure diversity is complete. M & B Oil says snap removal does not help otherwise.
• Weigh the appeal risk. A remand on this ground is unreviewable, and that was the result in Casola.

The one-year limit. If the case first became removable after the initial pleading, § 1446(c)(1) bars a diversity removal more than one year after commencement, unless the plaintiff acted in bad faith. To claim the exception, prepare evidence now, rather than arguing general suspicion.

If removal depends on improper joinder: think about the end of the case

Improper joinder, also called fraudulent joinder, lets you ignore a nondiverse defendant only if there is no possibility or no reasonable basis for a claim against it, depending on the circuit. The formulations vary, and the differences matter. The Fourth Circuit's "no possibility" language in Skidmore v. Schinke, No. 25-1436 (4th Cir. Mar. 30, 2026), and the Fifth Circuit's Rule 12(b)(6)-type test in Smallwood v. Illinois Central Railroad Co., 385 F.3d 568 (5th Cir. 2004) (en banc), are not the same standard. Some courts let the defendant present limited evidence on discrete facts, as the Ninth Circuit did in Morris v. Princess Cruises, Inc., 236 F.3d 1061 (9th Cir. 2001). That same circuit held in Hunter v. Philip Morris USA, 582 F.3d 1039 (9th Cir. 2009), that a defense reaching the merits of the claims against every defendant does not show improper joinder of one of them.

Now look at what Hain Celestial does to the risk. A district court's denial of remand on this ground is not reviewable until final judgment. If the appeals court later disagrees, everything after that point is void, including a defense judgment. So the defendant who wins the joinder ruling should ask the court to reduce that risk. The Supreme Court noted that a partial final judgment under Fed. R. Civ. P. 54(b) or an interlocutory certification under 28 U.S.C. § 1292(b) could resolve the question early. The how-to is in Interlocutory Review Toolkit: 1292(b) Certifications, Rule 54(b) Judgments, and Mandamus Petitions. A plaintiff who believes the ruling is wrong has the opposite calculation, since the issue survives through judgment as insurance against a trial loss. A prompt remand motion, like the Palmquists', keeps the equities on that plaintiff's side. Both sides should note Justice Thomas's concurrence, which questions the doctrine altogether.

Days 10 to 25: Draft and assemble

The notice of removal, under § 1446(a), must be signed under Rule 11 and contain a short and plain statement of the grounds, along with all process, pleadings, and orders served on the defendant. A strong notice says what happened and when, with dates. It identifies every party's citizenship on the filing date and the removal date. It computes timeliness, describes consent, and addresses the forum-defendant rule and any improper joinder theory. For a defendant with an LLC in its chain, it names members, and a thin allegation is where a notice is most likely to be challenged. Defects in allegations can be fixed under 28 U.S.C. § 1653, but a new ground for removal generally cannot be added after the 30 days have passed.

Sample paragraph:

This Notice is timely under 28 U.S.C. § 1446(b)(1) because Defendant Sandhollow Pump Works, Inc. was served with the Summons and Complaint on March 6, 2026, by personal delivery to its registered agent, and this Notice is filed within 30 days of that date. No other defendant has been served, according to the docket of the Circuit Court of Lake County, Illinois, reviewed on March 26, 2026.

Also prepare the civil cover sheet, the disclosure statement required by Rule 7.1, and whatever else local rules demand, such as a copy of the state docket sheet or a separate notice of related cases. Local requirements vary considerably, so check the local rule and the assigned judge's standing order. Check the current filing fee under 28 U.S.C. § 1914 and the court's fee schedule.

The filing day

File in the district and division embracing the state court. Polizzi v. Cowles Magazines, Inc., 345 U.S. 663 (1953), explains that § 1441(a) sets venue for removed cases, so ordinary venue statutes do not control; transfer remains available afterward. Then, promptly, give written notice to all adverse parties and file a copy with the state court clerk under § 1446(d). That second filing is what effects removal and stops the state court. Do both the same day. Send the conformed copy to the state judge's chambers if the local custom calls for it.

After removal

• Respond on the shorter schedule. Under Fed. R. Civ. P. 81(c)(2), a defendant who has not answered must do so within the longest of 21 days after receiving the initial pleading, 21 days after service of the summons, or 7 days after the notice of removal. For a defendant who removed on day 25, that may leave a week. Consider a Rule 12(b) motion, and see Drafting an Answer and Affirmative Defenses: A Practical Guide.
• Check the jury demand. Under the current Rule 81(c)(3), a party who expressly demanded a jury under state law need not renew, and if state law did not require a demand, none is needed unless the court orders it; otherwise a demand is due within 14 days of filing or service of the notice when all pleadings have been served. A pending amendment would eliminate that state-law exemption. It was recommended to the Judicial Conference in 2026 and has not taken effect, so read the rule in force on your date. The safe practice either way is to file a demand.
• Serve anyone unserved. 28 U.S.C. § 1448 lets process issue from the federal court.
• Supplement Rule 7.1 if anything changes.

Step 5: Remand, from both sides

For the plaintiff: sort the defects, then count

The most important date is 30 days after the notice was filed. 28 U.S.C. § 1447(c) requires any motion based on a defect other than lack of subject-matter jurisdiction to be made in that time. Otherwise the defect is waived. Sort your grounds accordingly.

Why promptly, when jurisdictional defects can wait? Because the court in Hain Celestial was explicit that the Palmquists "diligently asserted" their forum right. Rule 21 fights, equitable arguments, and judicial patience all run in favor of the party who raised the problem early. Delay also costs you the fee argument and lets the other side build a federal record.

Who bears the burden. The removing party. Many courts add that doubts are resolved in favor of remand, relying on Shamrock Oil & Gas Corp. v. Sheets, 313 U.S. 100 (1941), though the Supreme Court has said no such presumption applies under CAFA and left open the ordinary diversity case in Dart Cherokee.

The appeal asymmetry. If you win remand, § 1447(d) ordinarily ends the matter. If you lose, preserve the objection and appeal after judgment. Be careful with a settlement or voluntary dismissal, which can moot the issue.

Fees. § 1447(c) allows just costs and actual expenses, including attorney fees. Martin v. Franklin Capital Corp., 546 U.S. 132 (2005), allows fees only where the removing party lacked an objectively reasonable basis, absent unusual circumstances. Ask in the motion, keep time records from the start, and tie the request to a concrete failure: a 40-day-old notice, an obvious lack of consent, or a theory foreclosed by controlling precedent. Remember the other direction too: a court that grants remand may simply decline a fee request on a close question, and an aggressive fee request can undercut credibility. Fee procedures and evidence are covered in Preparing and Opposing a Fee Petition: A Practical Guide.

The amendment route after Royal Canin

If the case was removed on a federal question and you are willing to give up the federal claim, amend it out. Under Fed. R. Civ. P. 15(a)(1) you may amend once as of right within 21 days after service of a responsive pleading or Rule 12(b) motion, and otherwise you need consent or leave. Under Royal Canin, once a proper amendment leaves only state claims in a non-diverse case, the court must remand, and the Ninth Circuit has extended the logic further. In Walker v. Arizona, No. 24-1806 (9th Cir. Oct. 22, 2025), a joint stipulation dismissing the federal claims was treated like an amendment, with the result that the court lost its power to enter final judgment. In Faulk v. Jeld-Wen, Inc., No. 24-4078 (9th Cir. Nov. 14, 2025), deleting class allegations ended CAFA jurisdiction, and the panel treated an earlier circuit rule fixing CAFA jurisdiction at removal as irreconcilable with Royal Canin. Those decisions are Ninth Circuit law, and they should be read carefully elsewhere.

Before you do this, count the costs. A dropped federal claim is gone from this case, and you may face claim-preclusion and limitations problems if you later want it. A court can deny leave to amend under Rule 15(a)(2) if you are past the as-of-right window, so timing matters, and the amendment doctrine is covered in Moving for or Opposing Leave to Amend a Pleading: A Practical Guide. The amendment should also be genuine; a state claim that still necessarily raises the federal issue can stay in federal court under Gunn. And the trick does not work on amount: under Royal Canin's footnote 8, reducing the number after removal usually changes nothing.

Joining a nondiverse party after removal

§ 1447(e) gives the court two options if you seek to add a defendant who would destroy diversity: deny joinder, or allow it and remand. Rule 15 does not control here. Courts use the factors from Hensgens v. Deere & Co., 833 F.2d 1179 (5th Cir. 1987), which the Fourth Circuit adopted in Mayes v. Rapoport, 198 F.3d 457 (4th Cir. 1999): the extent to which the purpose of the amendment is to defeat federal jurisdiction, whether the plaintiff has been dilatory, whether the plaintiff will be significantly injured if amendment is denied, and any other equities. Move early, show the new defendant came to light through actual facts, and explain why a separate state suit would be wasteful. As Royal Canin notes, if joinder is allowed, the case goes back. Hain Celestial left open whether a court can later use Rule 21 to drop such a party.

For the defendant: answering a remand motion

Your job is to prove jurisdiction with evidence and to respond on any procedural ground raised on time. Do not assume you can add a new ground for removal in the opposition brief. Support citizenship by declaration, and support amount by documents, on the Dart Cherokee preponderance standard. If the plaintiff's motion is late on a procedural defect, say so. If the defect is real and the case is weak for removal, consider consenting to remand. A short stipulation may avoid fees, and it shows candor to the court you may be in front of again.

One thing to avoid: defending a federal forum while also arguing the plaintiff has no standing. As the Seventh Circuit held in Collier v. SP Plus Corp., 889 F.3d 894 (7th Cir. 2018), removal puts the burden of showing standing on the defendant, and a no-standing ruling leads to remand, not dismissal. The Pleading and Attacking Standing in Federal Court: A Practical Guide has more detail. If your real goal is a no-injury dismissal, ask whether the state system is a worse place to raise it. In privacy cases in some states, it may be.

Step 6: What to do when a defect surfaces late

At some point, one side finds out that diversity was never there. The right move depends on when, and on who is winning. Here is the order of operations.

First, confirm the fact. Get documents dated to the filing date. People confuse current membership with past membership, and residence with domicile, and a mistaken alarm is expensive too.

Second, tell the court. A federal court has an independent duty to examine its jurisdiction, and lawyers should not sit on a known defect in hope of a favorable verdict. Rule 11 and candor duties apply, and Belleville Catering Co. v. Champaign Market Place, L.L.C., 350 F.3d 691 (7th Cir. 2003), shows how a court may react when counsel try to brush the issue aside. The court there shifted the cost of further proceedings onto the lawyers, directing them to finish the case in state court without additional fees. A lawyer who discovers a problem should also speak with her client promptly, because the client's money is what is at risk.

Third, sort the problem into the right box.

• The facts support jurisdiction and only the allegations are defective. Amend under § 1653. This works in the trial court and on appeal, as Newman-Green, Inc. v. Alfonzo-Larrain, 490 U.S. 826 (1989), explains.
• A dispensable nondiverse party is the problem. A plaintiff can ask to drop it under Fed. R. Civ. P. 21. Newman-Green allows this even on appeal, if no one is prejudiced. Check whether the party is required under Rule 19. Consider whether the dismissal could prejudice someone. Hain Celestial says this tool is not available to a defendant seeking to oust a properly joined nondiverse codefendant over the plaintiff's objection.
• The nondiverse party can leave by consent before judgment. That is the Caterpillar route, in Caterpillar Inc. v. Lewis, 519 U.S. 61 (1996). It requires that the party really be gone, with no chance of return.
• The nondiverse citizenship belongs to a party that must stay, such as an LLC's own member. There is no fix. Grupo Dataflux v. Atlas Global Group, L.P., 541 U.S. 567 (2004), rules out relying on a later change in citizenship, however close to trial. An LLC's members may reorganize, and it may refile, but the existing case cannot be saved that way.
• A federal claim was the only basis and it has been dismissed by the court. Supplemental jurisdiction survives, and the court decides under § 1367(c) whether to keep the state claims. A remand on that basis is not jurisdictional, and it is reviewable under Carlsbad Technology, Inc. v. HIF Bio, Inc., 556 U.S. 635 (2009).

Fourth, protect the claim. If dismissal is coming, compute the limitations position today. 28 U.S.C. § 1367(d) stops the clock for supplemental claims under Artis v. District of Columbia, 583 U.S. 71 (2018), but it does not cover a diversity case with no original jurisdiction. Many states have savings statutes for actions dismissed without prejudice for jurisdictional reasons, with short and varying windows. Find yours now. In a removed case, remand instead of dismissal should preserve the original filing date. See Statute of Limitations Diary Checklist: A Practical Checklist.

Fifth, plan what the work is worth. Discovery from the federal case can often be reused by agreement, and stipulating to that early saves real money. Federal rulings do not automatically carry over, but the parties can stipulate on evidence, experts, and schedule.

Sample letter opening when you find a defect:

We have learned that [entity] had a member domiciled in [state] on [date of filing]. That fact appears to defeat complete diversity under 28 U.S.C. § 1332(a). We intend to file a notice with the Court by [date]. Please let us know by [date] whether your client will stipulate to [dismissal without prejudice/remand] and to the use of existing discovery in the state court proceeding.

A worked example for the defense side

Suppose Cormorant Tool Works, an Ohio corporation with its headquarters in Dayton, is sued in Indiana state court by Ingrid Lindqvist, an Indiana machinist injured on a Cormorant press. She also names Hoosier Line Supply, the Indiana dealer that sold it, alleging that the dealer told her employer the guard was certified. Complete diversity fails unless the dealer is improperly joined.

Service on Cormorant occurs on June 2, with day 30 falling on July 2. By June 10, its counsel has an affidavit from the dealer saying it sold the press in a sealed crate, and has read Indiana's law on innocent sellers. On June 24, the notice is filed, citing improper joinder and describing the dealer's affidavit, with a Rule 7.1 statement and the state court notice filed that day. The dealer's consent is unnecessary if the theory holds but is provided anyway. Under Rule 81(c)(2), the response is due on the longest of the listed periods, and here that is seven days after the notice, July 1, because the 21 days from service ran out on June 23. Counsel files a Rule 12 motion on June 30.

Lindqvist moves to remand on July 15, and on October 1 the district court denies remand and dismisses the dealer. Here is where the 2026 analysis comes in. Cormorant's counsel can decide to win on summary judgment two years from now and risk an appeal that erases the win, or it can immediately ask the court to enter a Rule 54(b) judgment as to the dealer, or to certify the order under § 1292(b). The first is simple but may be slow; the second may be refused. Counsel should discuss both with the client. If the court refuses, Cormorant should at least understand that the Indiana dealer's allegations will be reviewed again de novo after judgment. If the Seventh Circuit later finds a reasonable possibility of a claim, the whole case goes to state court, as in Hain Celestial.

What it costs and what you trade

Precise numbers vary by market and complexity, so treat these as relative rather than fixed.

Common mistakes

Pleading "residence." It is not citizenship. Nearly every court that sees it will send it back, and some have shown little patience.

Treating an LLC like a corporation. A Delaware LLC is not a Delaware citizen by virtue of formation. Its citizenship comes from its members.

Reading the docket instead of the rule on service. A plaintiff's filing of proof of service can trail actual service. Do not assume no one has been served because no return is on file. Ask.

Counting from the wrong date. The clock runs from service on that defendant, not from the courtesy copy, and not from the date a co-defendant was served. Equally, an amended pleading that first reveals removability starts its own clock, under § 1446(b)(3), even if you were not paying attention to it. Some circuits, under cases like Harris v. Bankers Life & Casualty Co., 425 F.3d 689 (9th Cir. 2005), Moltner v. Starbucks Coffee Co., 624 F.3d 34 (2d Cir. 2010), and Lovern v. General Motors Corp., 121 F.3d 160 (4th Cir. 1997), look only to what the papers show on their face; others are less defined.

Waiting because the theory is not ripe. After Enbridge, a defendant cannot litigate for two years, get a helpful ruling elsewhere, and then remove. If the case was removable on day one, the clock started on day one.

Forgetting § 1446(d). A notice filed in federal court without a copy to the state clerk has not effected removal. Meanwhile, a state court can keep going, and a default can enter.

Assuming removal freezes everything. Check the seven-day period under Rule 81(c)(2). Defendants have defaulted by assuming they had another 21 days. If a default does occur, see Obtaining or Setting Aside a Default Judgment: A Practical Guide.

Removing and then disclaiming federal jurisdiction. A no-standing motion after removal generally results in remand.

Relying on snap removal when the parties are not diverse. It solves only the forum-defendant problem.

Treating a favorable joinder ruling as final. After Hain Celestial, it remains open to reversal until the appeal ends.

Skipping the Rule 7.1 statement or making it perfunctory. It is mandatory in a § 1332(a) case, and it is how many of these problems come to light.

Sitting on a known defect. It is unlikely to help, and courts have shifted the cost to the lawyers.

This guide is general information and not legal advice for a specific situation. If a removal clock is running or a defect has just surfaced, get litigation counsel involved while there are still options to choose among.

Related Documents

Related Articles

• Federal Subject-Matter Jurisdiction: Arising Under, Diversity, Supplemental Claims, and the Defect That Never Waives: the doctrine and leading cases behind each step.
• Forum Selection, Transfer, and Parallel Proceedings: Choosing and Keeping the Court You Want: forum clauses, transfer, and competing suits.
• Interlocutory Appeals and Mandamus: Getting Appellate Review Before Final Judgment: how early review works when a joinder ruling needs it.

Related Guides

• Removal and Remand: Getting a Case to Federal Court and Keeping It There: a further walk-through of removal mechanics and fraudulent joinder.
• Moving or Keeping a Case in Your Chosen Forum: A Practical Guide: transfer and forum strategy after the jurisdictional question is answered.
• Removing or Remanding a Class Action Under CAFA: A Practical Guide: the class action version of these steps.
• Pleading and Attacking Standing in Federal Court: A Practical Guide: how to address the Article III issue that can undo a removal.
• Bringing or Defending a Civil Computer Fraud and Abuse Act Claim: A Practical Guide: a common federal anchor for technology disputes.
• Onboarding a Competitor's Employee Without Importing Its Secrets: A Practical Guide: trade secret disputes where the choice of a federal claim sets the forum.

Related Checklists

• Federal Jurisdiction and Removal Checklist: A Practical Checklist: the companion phase-by-phase checklist.
• Statute of Limitations Diary Checklist: A Practical Checklist: for protecting a claim when a dismissal is coming.

Related Toolkits

• Federal Jurisdiction Toolkit: Notices of Removal, Remand Motions, and Jurisdictional Allegations: the companion templates.
• Interlocutory Review Toolkit: 1292(b) Certifications, Rule 54(b) Judgments, and Mandamus Petitions: forms for the early-review step.