An acknowledgment of service is a signed form in which a defendant confirms they received the complaint and summons that start a lawsuit, so the plaintiff does not have to pay a process server to hand-deliver the papers. Federal courts call the same document a “waiver of service,” and many state courts call it an “acceptance of service,” but the function is identical.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons Signing it affects how long you have to respond, who pays for service, and whether the case moves forward on schedule.
What Signing Confirms (And What It Doesn’t)
Signing confirms one thing: you received the paperwork. It is not an admission of fault, and it is not a concession that the court has authority over you. Under the federal rules, waiving formal service explicitly preserves your right to challenge personal jurisdiction and venue later in the case.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons Every defense you had before signing, you still have after.
That includes arguing the court lacks jurisdiction, that the complaint fails to state a valid claim, or that you simply didn’t do what the plaintiff says you did. The signature only closes one issue: whether notice reached you.
How the Request Reaches You
The plaintiff mails you a copy of the complaint, two copies of the waiver form, and a prepaid envelope for returning the signed form. The written request must name the court where the complaint was filed, state the date it was sent, and explain the consequences of signing or refusing.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons You review it, sign it, and mail it back.
You get a real window to decide. Federal rules give defendants inside the United States at least 30 days to return the form, and defendants outside the country at least 60 days.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons
Why Signing Usually Helps You
The main reason to sign is time. A defendant served formally by a process server has 21 days to file an answer.2Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections When and How Presented A defendant who signs and returns the waiver gets 60 days from the date the request was sent, or 90 days if outside the United States.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons That difference can decide whether your answer is rushed or well-prepared.
Signing also removes the cost of a process server from the case, which matters for both sides. The plaintiff saves the fee; you avoid being tracked down at work or at home.
What Refusing Costs You
If you are inside the United States and you ignore or refuse the request without good cause, the court must order you to pay the costs the plaintiff later spends on formal service, plus reasonable attorney’s fees for the motion to collect those costs.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons This is not discretionary. The rule exists because defendants have a duty to avoid pointless service expenses.
“Good cause” is narrow. Not feeling like cooperating doesn’t count. Hoping to delay the case doesn’t count. Legitimate reasons tend to look like never actually receiving the request, or having a real basis to think the request was defective. Refusing for any other reason just adds a bill to a case you still have to defend.
Your Deadline to Respond
In federal court, the clock depends on how you were served:
- Served formally by a process server or sheriff: 21 days to file an answer.2Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections When and How Presented
- Signed the waiver and you are inside the United States: 60 days from the date the request was sent.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons
- Signed the waiver and you are outside the United States: 90 days from the date the request was sent.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons
State courts set their own deadlines, and the numbers vary. Some states allow as few as 20 days; others allow 30 or more. Check the rules for the specific court handling the case before you count on any particular window.
What Happens If You Do Nothing
Ignoring the lawsuit is the worst option. If you don’t respond in time, the clerk can enter a default against you. When the plaintiff’s claim is for a specific dollar amount, the clerk can enter judgment for that amount plus costs without a hearing. For claims where damages have to be calculated, such as a personal injury case, the court holds a hearing and may take evidence before entering judgment.3Legal Information Institute. Federal Rules of Civil Procedure Rule 55 – Default Default Judgment
Either way, you lose without presenting a defense. Overturning a default judgment later is possible but difficult and expensive. For most defendants, signing the acknowledgment and using the extra time to prepare a real response is the better move.