Concept
Same-Transaction Amendments
Relation back of amendments
Same-Transaction Amendments
Rule 15(c)(1)(B) supplies the second route to relation back: an amendment relates back when it asserts a claim or defense that arose out of the conduct, transaction, or occurrence set out, or attempted to be set out, in the original pleading.1 The route compares two documents and asks whether the amendment describes the same events as the original. The words “attempted to be set out” carry the comparison to events the original pleading described imperfectly. Among the parties already in the case, the test governs claims and defenses alike.2
The test looks to events because of what a limitations period promises a defendant. Recall Ernie, who sued Violet for breach of contract on April 1, 2017, two days before the three-year period ran on her April 3, 2014 sale of worthless stock. Four months later, after the limitations period has passed, Ernie’s counsel adds a fraud claim. Relation back treats an amended claim as though the plaintiff had asserted it in the original pleading, and the fraud claim rests on the same sale that the contract claim already put in issue.3 Violet was sued over that sale before the period ended, so the new claim asks her to investigate nothing she was not already investigating. A plaintiff in Ernie’s position can add claims to a timely suit without facing a limitations bar, so long as each claim arises from the conduct the original pleading set out.4
The same showing matters beyond amendments among the original parties. Rule 15(c)(1)(C), which governs amendments that change the party or the naming of the party sued, applies only “if Rule 15(c)(1)(B) is satisfied” and the party to be brought in meets further conditions within the period Rule 4(m) provides for serving the summons and complaint.5 A plaintiff who wants a new defendant after the period has run must therefore prove the same-transaction connection first. The first subsection below defines the transactional test, and the second marks the line between added detail and new facts.
The Transactional Test
The rule’s three nouns, conduct, transaction, and occurrence, name one thing: a set of real events, such as a stock sale, an accident, or a series of dealings under one agreement. A court therefore asks what happened between the parties and whether the original pleading told the defendant about it, and the legal label the plaintiff first chose does not control. To answer, courts read the “operational facts” in the original complaint and ask whether they put the defendant on notice of the claim the plaintiff now seeks to add.6
The principle underneath is the one limitations law exists to serve. The court in Banks v. St. Mary’s Hospital and Medical Center stated it this way:
[T]he relation back doctrine is based upon the principle that one who has been given notice of litigation concerning a given transaction or occurrence has been provided with all the protection that statutes of limitation are designed to afford. Thus, if the litigant has been advised at the outset of the general facts from which the belatedly asserted claim arises, the amendment will relate back even though the statute of limitations may have run in the interim.7
Bonerb v. Richard J. Caron Foundation rested a belated amendment on the same reasoning. In Barthel v. Stamm, the court explained why the reasoning holds: a filed suit “warns the defendant to collect and preserve his evidence in reference to it,” and a defendant sued in federal court “knows that the whole transaction described in it will be fully sifted, by amendment if need be, and that the form of the action or the relief prayed or the law relied on will not be confined to their first statement.” An amendment of the sort the rule describes is “within the scope of the original suit and a part of it.”8 The court added that the Supreme Court had gone far in this direction even before the Rules. In New York Central & Hudson River Railroad Co. v. Kinney, a railroad employee’s injury suit that relied wholly on state law and never mentioned interstate commerce could be amended after the limitations period into a suit under the Federal Employers’ Liability Act, with materially different rights and liabilities.9 The events stayed fixed, and only the law relied on changed.
Later courts follow that logic when plaintiffs add new theories in bulk. In Koal Industries v. Asland, the defendants argued that the plaintiffs’ RICO, fraud, tortious interference, and breach of fiduciary duty claims could not relate back because the original complaint had not included them. The court rejected the argument. It explained that the amended claim need only arise out of the conduct, transaction, or occurrence set forth in the original pleading, that nothing requires the new claim to have been asserted originally, and that “[a] single transaction or occurrence can give rise to numerous claims.” An amendment “that changes only the legal theory of the action, or adds another claim arising out of the same transaction or occurrence, will relate back.”10
The elements of the added claim may differ sharply from those of the original, and the amendment can still relate back. A treatise pairs a false-arrest claim with a civil rights claim that requires proof of discriminatory intent: the amendment would relate back, although a court might deny leave to amend if evidence unique to the civil rights claim had been lost or destroyed.11 The two questions are separate. As one court put it, “[l]eave to amend under subsection (a) and relation back under subsection (c), while obviously related, are conceptually distinct.”12 A later section takes up leave to amend.
The rule reaches a “claim or defense,” so the same analysis governs a defendant’s amended answer, including a counterclaim.13 In Tri-Ex Enterprises v. Morgan Guaranty Trust, a counterclaim first interposed in an amended pleading some eight years after the underlying events would have been barred if sued upon separately. The court nonetheless found it hardly open to doubt that the amendment related back to the date of the original filing.14
A claim that arises from a different transaction or occurrence, or from different alleged conduct, does not relate back.15 Suppose a buyer sues a supplier for failing to deliver lumber on June 1, 2008 and, after the limitations period runs, adds a claim that the supplier delivered defective concrete on July 15, 2009 under a different contract. The parties are identical and the dispute is of the same kind, but the lumber contract and the concrete contract are two agreements, breached more than a year apart. The facts needed to prove the concrete claim differ materially from those in the lumber complaint, and a suit about lumber warned the supplier of nothing about concrete.16 The amendment stays outside the original suit and takes its own filing date.
Added Detail Versus New Facts
The hard cases sit at the margin, where an amended complaint is longer, more specific, and sometimes broader than the original, and the court must decide whether the added material tells the same story better or tells a different one. Courts take a narrow view of “same conduct.” When an amendment changes only the plaintiff’s claim or theory, the test is typically met, but when the facts needed to sustain the amended pleading differ materially from those in the original complaint, the court is likely to find it unmet.18
The line tracks notice. Amendments that amplify or restate the original pleading, or set forth facts with greater specificity, should relate back, while amendments that bring new claims based on new facts and different transactions should not.19 A defendant handed a complaint about an event has already begun gathering the witnesses and records that event calls for, and added detail about the same event sends the defendant nowhere new.
One federal court calls adequate notice of the occurrence behind the amended claim the most important factor in the analysis.20 In Azarbal v. Medical Center of Delaware, the original complaint alleged that Dr. Palacio was negligent in performing an amniocentesis. The amended complaint alleged that he was negligent after the procedure in not telling Ms. Azarbal that it had caused fetal injury, and it added a claim of lack of informed consent for her sterilization.21 The court found that the original complaint gave Dr. Palacio adequate notice of the basis for the informed-consent claim, because that claim, like the original one, involved his behavior with respect to the amniocentesis.22 The new claim concerned a later omission and a later procedure, yet it grew out of conduct the original complaint had already pleaded.
The same result follows when a later securities complaint elaborates allegations already made about an issuer’s financial statements, as in re Alstom SA Securities Litigation, and when an amended complaint identifies further items of a kind the original complaint said were at issue, as in re McMullen Oil Co. In each, the original pleading pointed toward the added material, so the amendment amplified the events already pleaded and added none.
An amendment that depends on a separate course of dealing sits at the other pole. In McDonald v. Davis, the plaintiff’s federal FLSA claim began to accrue in December 2003, and he did not assert it until May 2008, so it was time-barred unless it related back.23 It did not. The original complaint concerned his employment negotiations with the defendants, his engagement as a reporter, and his departure from The Daily News. The FLSA claim rested on additional facts arising out of a separate course of dealing, and the court found no common core of operative facts between it and the original claims.24
Separate injuries produce the same result. A worker who suffered both back and respiratory problems during his employment at sea could not relate one claim back to the other, because the injuries were unrelated and occurred at different times, as the Second Circuit held in Mackensworth v. S.S. American Merchant.25 Courts describe the working test as whether the added claim arose from the same “core of operative facts” as the original one, and a claim resting on the same facts under a different legal theory passes.26
Lawyers sometimes call an amendment that fails this test a “new cause of action,” meaning a claim that does not arise out of or relate to the conduct, occurrence, or transaction in the original pleading.27 The word “new” there refers to operative facts. Ernie’s fraud count is new as a label and still relates back, because it rests on the same sale as his contract count. The FLSA claim in McDonald is new in the way that matters, because it rests on facts the original complaint never touched. The usual error is to ask whether the amendment adds a new count, when the question is whether it adds new operative facts.
The third step does most of the work. The wage claim in McDonald fails it, while the informed-consent claim in Azarbal passes it, because both complaints centered on the same physician’s conduct around the same amniocentesis.
Relation back also differs from tolling. Relation back dates an amended claim to the original pleading, while tolling suspends the running of the limitations period. In class litigation, for example, courts have split over whether tolling ends when the district court denies class certification or continues until the appellate court denies a Rule 23(f) petition.28
These steps compare claims and defenses among parties already in the case. When an amendment brings in a new defendant, passing the same-transaction test is only the first requirement, because Rule 15(c)(1)(C) incorporates Rule 15(c)(1)(B) and then adds conditions about the new party.29 Several courts have also read Rule 15(c)(1)(C) to reach only “wrong party” cases and not “additional party” cases, a reading one judge has called too restrictive.30 The party-changing sections below take up those questions.