To fill out an affidavit of service, the person who delivered the court papers writes down exactly what was delivered, to whom, where, when, and how, then signs the form under penalty of perjury or in front of a notary and files it with the court. Every blank on the form needs an answer, every detail has to match the underlying court documents, and the signature has to be executed the way the form specifies. Get those three things right and the affidavit will do its job.
Before You Touch the Form
Two things need to be settled before anyone starts writing. The first is who is doing the serving. Under the federal rules, any person who is at least 18 years old and is not a party to the lawsuit can serve a summons and complaint.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons You cannot serve the papers in your own case. A friend, a relative, or a hired process server can, as long as they meet the age requirement and have no involvement in the dispute. Some state courts require a sheriff or a licensed process server for certain case types, so check your local rule.
The second is having the facts in hand. The server should gather everything before sitting down with the form:
- The full case caption — both parties’ names, the name of the court, and the case or docket number — copied exactly from the original court filings.
- The server’s full legal name, mailing address, and contact information.
- The recipient’s full legal name and the address where delivery took place.
- The exact date, time, and physical location of the delivery.
- The method used: personal hand-delivery, substituted service through another person at the recipient’s home or workplace, or another authorized method.
- The name of every document delivered — “Summons,” “Complaint,” “Motion for Temporary Restraining Order,” and so on.
If substituted service was used, meaning the papers were left with someone other than the defendant, most forms also require a physical description of that person (approximate age, height, weight) and their relationship to the defendant. Those details help the court confirm the papers went to an appropriate recipient.
Get the correct form from the court where the case is pending. Most courts post their official affidavit of service on the court website, and the clerk’s office keeps paper copies. Using the court’s own form avoids rejection on formatting grounds.
The Caption
The top of the form mirrors the caption on the original court filings. Transcribe the plaintiff’s name, defendant’s name, court name, and case number exactly as they appear on the summons or complaint. Small discrepancies cause real problems: a misspelled name or a transposed digit in the case number can create confusion in the court’s filing system and give the other side something to point at later. If the original documents themselves contain an error, reproduce that error here and flag it separately with the clerk rather than silently correcting it.
Server Information and What Happened
The next section is where the server identifies themselves and describes the service event. Fill in the server’s full name, address, and confirmation that they are at least 18 and not a party to the case.
Then describe the delivery in concrete terms. The date. The time. The street address. The name of the person who received the documents. Be specific about the time: “approximately 2:15 p.m.” is fine, “afternoon” is not. Some jurisdictions restrict the hours during which service can occur, and the court needs enough precision to evaluate whether the delivery fell inside those limits.
Method of Service
The form will have a section, often with checkboxes, for the method of service used. Federal rules allow several approaches for serving an individual: delivering copies directly to the person, leaving copies at the person’s home with someone of suitable age and discretion who lives there, or delivering copies to an authorized agent.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons The box you check must match what actually happened. If you left the papers with the defendant’s spouse at their home, that is substituted service, not personal service, and checking “personal” makes the affidavit inaccurate on its face.
If the method requires supporting documentation, such as a signed return receipt for certified mail, attach a copy to the completed affidavit as an exhibit.
List Every Document Delivered
Name each document. Do not write “court papers” or “the filing.” Write “Summons,” “Complaint,” “Motion for Temporary Restraining Order,” and continue through everything in the packet. The court needs a record showing the defendant received each item they were entitled to receive.
Fill in every blank field on the form. A blank space invites a challenge. If a field genuinely does not apply, write “N/A” rather than leaving it empty.
Signing: Notary or Penalty-of-Perjury Declaration
Do not sign the form until you are in front of whoever will witness the signature, because most forms require a witnessed signature.
Whether you need a notary depends on the court and the form. A traditional affidavit requires the server to sign in front of a notary public, who verifies identity, administers an oath, and applies an official stamp. Federal law also allows an unsworn written declaration signed under penalty of perjury to substitute for a notarized affidavit in most situations.2Office of the Law Revision Counsel. 28 U.S. Code 1746 – Unsworn Declarations Under Penalty of Perjury Many state courts accept the same approach. The declaration must include specific language: “I declare under penalty of perjury that the foregoing is true and correct,” followed by the date and signature.
Read the form. If it contains a notary block, the court expects notarization. If it contains a penalty-of-perjury declaration line instead, a notary is not needed. When you cannot tell, getting the document notarized covers you either way. Either method carries the same weight; a signed declaration under penalty of perjury has the same legal force as a sworn oath, and lying on the form can support criminal perjury charges regardless of which route you took.2Office of the Law Revision Counsel. 28 U.S. Code 1746 – Unsworn Declarations Under Penalty of Perjury
Filing the Completed Affidavit
File the completed affidavit with the clerk of court where the case is pending. Most courts accept filings in person at the clerk’s office or through an electronic filing portal. If your court uses e-filing, scan the signed and notarized original and upload it through the court’s system.
Two timing rules matter. First, the defendant has to be served within a set window. In federal court that window is 90 days after the complaint is filed; if the defendant is not served in time, the court must dismiss the case without prejudice or extend the deadline for good cause.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons State deadlines vary but follow the same idea.
Second, filing the proof of service starts the defendant’s response clock. In federal court a defendant generally has 21 days after being served to file an answer. If you served the papers but never file the affidavit, the court has no record that service happened and the case stalls. Failure to prove service does not automatically invalidate the service itself, and courts can permit amendments to fix defective proof.1Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons Amending after the fact still costs time and invites scrutiny, so it is worth getting right the first time.
Mistakes That Get Affidavits Rejected
The same errors show up over and over. Run through this list before you file:
- Leaving fields blank. Every empty space is a potential objection. Write “N/A” when a field does not apply.
- Mismatched case information. The caption on the affidavit has to match the caption on the original filings exactly.
- Vague service descriptions. “Served at defendant’s home” tells the court almost nothing. Give the street address, date, time, and name of the person who took the papers.
- Wrong method checked. Substituted service is not personal service. Check the box that matches what actually happened.
- Missing notarization or missing declaration language. If the form requires a notary block and you skip it, the affidavit is not properly executed. Same problem if it requires the penalty-of-perjury language and you leave it out.
- Server who is a party. If someone involved in the lawsuit served the papers, the service is invalid no matter how well the form is filled out.
If You Could Not Serve the Defendant
If the server tried but could not complete delivery, they should prepare an affidavit of non-service, sometimes called an affidavit of due diligence, instead. It records the server’s name and contact information, the date and time of each attempt, and why each attempt failed. Filing it creates a record of good-faith effort and supports your next move, whether that is asking for more time, requesting court approval for an alternative method, or, in some cases, pursuing service by publication. Courts generally want to see multiple attempts on different days and at different hours before approving alternatives.
If You Are Heading Toward a Default Judgment
If you served the defendant and they never responded, the affidavit of service is not the last form you will file. Before a court can enter a default judgment, federal law requires an additional affidavit stating whether the defendant is in active military service, under the Servicemembers Civil Relief Act. That is a separate document with its own requirements, and lying on it is a federal crime punishable by a fine, up to one year in prison, or both.3Office of the Law Revision Counsel. 50 U.S. Code 3931 – Protection of Servicemembers Against Default Judgments Plan for it as a next step, not as part of the affidavit of service itself.