Service of Process: FRCP Rule 4(m) — The 90-Day Deadline
Filing a complaint is just the first step. You then have 90 days to actually serve it on the defendant. Miss this window and the court can dismiss your case without prejudice.
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The 90-Day Rule: FRCP Rule 4(m)
Under FRCP Rule 4(m), if a defendant is not served within 90 days after the complaint is filed, the court — on its own or on a motion — must dismiss the action without prejudice, or order service within a specified time.
Day 0
Complaint Filed
Clock starts today
Day 90
Service Deadline
Serve by this date
Day 91+
Risk of Dismissal
Without prejudice
Note: Dismissal without prejudice means you can refile — but if the statute of limitations has since expired, refiling will be barred. Start service early.
Acceptable Service Methods
FRCP Rule 4 specifies how different types of defendants may be served:
Individual Defendants (Rule 4(e))
- •Personal delivery to the individual
- •Leaving copies at dwelling with a person of suitable age
- •Delivering to an authorized agent
- •Following state law of the district where service is made or where the case is filed
Corporations & Business Entities (Rule 4(h))
- •Delivering to an officer or managing/general agent
- •Delivering to any other agent authorized to receive service
- •Following state law of the district or state of service
US Government (Rule 4(i))
- •Deliver to the US Attorney's office in the district
- •Send copy by registered mail to the Attorney General in DC
- •If suing an agency: also send copy to the agency
Who Can Serve Process (Rule 4(c))
Who CAN Serve
- • Any person who is at least 18 years old
- • Not a party to the case
- • Professional process servers (recommended)
- • US Marshals Service (by court order)
Who CANNOT Serve
- • The plaintiff or defendant themselves
- • Any party to the lawsuit
- • Anyone under 18 years of age
- • An attorney representing a party (in most circumstances)
Waiver of Service: The Smarter Option
Under Rule 4(d), plaintiffs can mail the defendant a request to waive formal service. If the defendant agrees:
- Plaintiff benefits: No need for a process server; no proof of service required
- Defendant benefits: Gets 60 days (or 90 if outside US) to Answer instead of 21 days
- If defendant refuses: Plaintiff serves formally; defendant pays the costs of service
- Defendant has 30 days to return the signed waiver (60 if outside US)
Proof of Service: Filing the Affidavit
After service is completed, you must file proof of service with the court (Rule 4(l)). The Affidavit of Service (also called Return of Service) is a sworn statement by the process server detailing how, when, and where service was made.
Important: The 21-day Answer clock for the defendant starts from the date of service, not from when you file the Affidavit. File promptly but keep a copy of the Affidavit for your records.
Affidavit of Service Template
A properly formatted Affidavit of Service that satisfies FRCP Rule 4(l) requirements — complete with notary acknowledgment section.
Get the Affidavit of Service →Getting an Extension of the 90-Day Deadline
Unlike the appeal deadline, the Rule 4(m) service deadline can be extended. The court must extend time if you show "good cause," and may extend for other reasons. To request an extension:
- 1. File a motion for extension of time to serve before the 90-day deadline
- 2. Explain your attempts to locate and serve the defendant
- 3. Show good cause: e.g., defendant evading service, wrong address, active military service
- 4. Proposed additional period: typically 60–90 additional days
State Court Service Deadlines
| State | Service Deadline | Key Rule |
|---|---|---|
| Federal | 90 days from filing | FRCP 4(m) |
| California | 3 years from filing (but practically within SOL period) | CCP § 583.210 |
| New York | 120 days from filing | CPLR § 306-b |
| Texas | No fixed deadline; diligence required within limitations period | TRCP 99 |
| Florida | 120 days from filing | Fla. R. Civ. P. 1.070(j) |
| Illinois | 30 days from issue of summons (with extensions) | 735 ILCS 5/2-202 |