Also known as:relation-back theory · relation back · relates back · relation-back doctrine
Written by attorneys · grounded in primary & secondary sources — see below
A procedural doctrine under which an amended pleading is treated as filed on the date of the original pleading for statute of limitations purposes. The doctrine applies when the law supplying the applicable statute of limitations itself permits relation back.
Sources & Authorities
How it applies
Common Examples
2
State Limitations Law Controls Amendment
Raymond Ramos sued Valley Hospital in federal court under diversity jurisdiction for malpractice under State X law. After the one-year state limitations period expired, he moved to amend and add a vicarious liability claim against Metro Physicians Group based on the same surgery. State X's malpractice statute contains a liberal relation back doctrine more generous than the federal standard. The court evaluates the amendment's timeliness under State X's rule because that law supplies the limitations period.
Corporate Overlap Supports Relation Back
Rajesh Rao sued River Jet for federal whistleblower retaliation after reporting safety defects. After the state limitations period expired, he moved to amend and add a state wrongful termination claim against Urban Orbit, River Jet's wholly owned subsidiary that handled the same disciplinary actions. The two entities share headquarters, officers, and a human resources department, and shared counsel received the original complaint within the Rule 4(m) period. State law treats the entities as a single employer for limitations purposes, so the amendment relates back.
Put it into practice
Test Yourself
10
Practice Questions5
· 9 primary sources
Select any source to read its text and confirm it supports the definition.
Cases
Federal Rules
Uniform Acts
Model Codes
Restatements
Casebooks
Willis v. Barrow218 Ala. 549, 119 So. 678 (1929)
Common questions
Frequently Asked
3
When may a federal court apply a state relation back rule more generous than the federal standard?+
A federal court applies the state rule when the claim arises under state law and the state statute of limitations supplies the time bar. The federal rule expressly permits relation back when the law providing the applicable limitations period allows it. This respects the substantive character of state limitations law under Erie.
Supporting sources
Does adding a new legal theory arising from the same facts support relation back under state law?+
Relation back is permitted when the new claim rests on the identical operative facts and conduct already alleged. State decisional law that treats the theories as interchangeable when based on the same representation satisfies the notice and repose policies of the statute of limitations.
Supporting sources
What facts determine whether affiliated corporations receive notice for relation back purposes?+
Shared headquarters, officers, registered agent, and counsel support imputing notice to the newly named entity. Formal separateness such as separate payroll and tax filings, together with the plaintiff's prior direct dealings with the distinct entity, weighs against relation back.
Supporting sources
Business Associations RelationshipsLiability rules related to business associations · Liability of general partners under the Revised Uniform Partnership Act (1997)NEXTGENFoundational