Case brief summary
When a Federal Rule of Civil Procedure properly covers an issue, federal courts must follow it instead of a conflicting state law, even in cases heard in federal court only because the parties live in different states.
Facts
A woman from Ohio sued the estate of a deceased Massachusetts driver over a car accident, filing in federal court because the parties lived in different states. She had papers delivered to the executor's wife at his home, which followed the federal rule for serving legal papers, but a Massachusetts law required papers to be handed directly to the executor or filed with the probate court within one year.
Procedural history
The federal district court sided with the executor, saying the stricter Massachusetts rule applied. The appeals court agreed, calling it a substantive issue rather than procedural. The Supreme Court then took the case.
Issue
When a federal procedural rule about how to deliver legal papers conflicts with a state law on the same topic, does the federal rule or the state law control in a diversity case in federal court?
Holding
The federal rule controls, so the service made on the executor's wife was valid and the case can go forward.
Reasoning
The Court explained that federal rules of procedure are valid as long as they regulate court process rather than people's actual legal rights, and this rule about serving papers fits that description. It also explained that a prior doctrine requiring federal courts to follow state law to prevent unfair differences and forum shopping (choosing a court just to get a better outcome) does not apply here because the service method made little practical difference and would not have affected which court someone chose to sue in.
Opinions
Majority (Warren): Federal Rule 4(d)(1) on serving legal papers is valid and controls over the conflicting Massachusetts law in this diversity case.
Concurrences (Harlan): Agreed with the result but argued the real test should be whether a state rule substantially affects people's everyday conduct, not just whether a federal rule can be labeled procedural.