An affidavit of non-service is a sworn statement, signed by the process server, that tells the court a defendant could not be personally served and lays out exactly what was tried. It records each attempt — date, time, address, what the server saw — and explains why delivery failed. Filed with the court, it becomes the basis for asking a judge to allow more time, authorize an alternative method of service, or otherwise keep the case alive.
When You Need One
Courts cannot exercise authority over a defendant who has not been properly served, so when a process server cannot hand over the summons and complaint, someone has to tell the court what happened. The affidavit is how that gets on the record.
Two situations drive most filings. The first is a request for alternative service. Before a judge will let you serve by publication in a newspaper, by posting on a door, or by mail, you generally have to show that ordinary personal delivery was genuinely attempted and failed. The affidavit is the evidence for that showing. The second is deadline pressure. Under Rule 4 of the Federal Rules of Civil Procedure, a plaintiff who does not serve the defendant within 90 days of filing the complaint faces dismissal, though the court must extend the time if the plaintiff shows good cause.1Office of the Law Revision Counsel. 28 USC App Fed R Civ P Rule 4 – Summons A well-documented affidavit of non-service is the single best piece of evidence for good cause. Dismissal is without prejudice, but if the statute of limitations has run, that distinction may not help.
State courts set their own deadlines, which can run anywhere from 60 to 180 days depending on the jurisdiction. The role of the affidavit is the same: it proves you weren’t ignoring the clock.
What the Affidavit Must Include
Formatting varies by jurisdiction, but the substance does not. A usable affidavit contains three things.
Case and Party Identification
The document names the court, the case number, the parties, and the person who attempted service. The process server’s name and contact information tie the affidavit to a real person the court can question. Most jurisdictions require the server to be at least 18 and not a party to the lawsuit.
An Attempt-by-Attempt Record
Each attempt gets its own entry with the date, time, and exact address. The server should describe what they observed: whether the residence looked occupied, whether anyone came to the door, whether vehicles were present, whether a neighbor said anything useful. Detail is what makes an affidavit credible. “Attempted service three times, subject not found” gives a judge nothing. “Visited 742 Oak Street at 6:15 p.m. on March 3, lights off, no vehicles, spoke with a neighbor who said the resident moved out in January” gives a judge something to work with.
The Reason Service Failed
The affidavit has to say why delivery could not be completed — the defendant appears to have moved, the address on file is wrong, the person refused to open the door. Any supporting evidence should go in with it: returned mail, a conversation with a building manager, a disconnected phone number, a note that someone looked through the blinds and did not open the door.
What Courts Count as Due Diligence
There is no universal checklist, and judges have wide discretion, but the bar is higher than most people expect. Two visits to a last-known address and giving up is almost never enough. Courts generally want to see:
- Multiple attempts at the last known address on different days and at different times, including evenings and weekends.
- Efforts to find a current address, such as checking with the post office for forwarding information, searching public records, and contacting known relatives or associates.
- A skip trace or similar professional search when initial efforts fail, particularly in larger cases.
Every one of those steps needs to appear in the affidavit. Judges look for signs that the plaintiff adapted when the first approach did not work — tried different times, checked other addresses, made calls, hired an investigator. Three attempts at the same address at the same time of day, with no follow-up investigation, is usually found insufficient.
Signing, Notarizing, and Filing
In most jurisdictions the affidavit is signed under oath in front of a notary public. Some states allow an unsworn declaration under penalty of perjury as a substitute; check local rules before assuming a notary is required.
The signed document is filed with the court handling the case, typically alongside a motion asking for alternative service or more time. Filing fees vary. Once filed, the affidavit is part of the official record, and the judge may set a hearing to question the process server about the attempts, especially before authorizing an alternative method.
Fixing Mistakes
Errors need to be corrected quickly, because a wrong date or address undermines the whole document. Minor slips — a typo, a transposed number — are handled with an amended affidavit, signed and notarized where required, filed with a short explanation of what changed. Larger problems, like a server having gone to the wrong address or a fabricated detail, may prompt a hearing where the court decides whether the error was honest or whether the affidavit as a whole is unreliable.
The Military-Status Affidavit That Comes Next
When a defendant cannot be found and the case moves toward default, federal law adds a separate requirement. Under the Servicemembers Civil Relief Act, the plaintiff must file an affidavit stating whether the defendant is in military service before any default judgment can be entered. If military status cannot be determined, the affidavit must say so. The court can require a bond in that case, protecting the defendant if it later turns out they were serving and the judgment is set aside. Filing a false affidavit about military status is a federal crime carrying up to a year in prison.2Office of the Law Revision Counsel. 50 USC 3931 – Protection of Servicemembers Against Default Judgments The Department of Defense runs a free online database for checking status, and running that search before filing is standard practice.
This is a different affidavit from the affidavit of non-service. The non-service affidavit documents failed attempts; the military-status affidavit is about the defendant personally. If the case is heading toward default, expect to file both.
What Happens After You File
The judge reviews the affidavit to decide one thing: did the plaintiff try hard enough to justify the next step? If yes, the court typically authorizes an alternative method. The common ones are service by publication in a newspaper for a set period, service by posting on the door of the last known address, and service by mail. A few courts allow service by email or social media in unusual circumstances, but that remains the exception. Available methods depend on the jurisdiction and the type of case.
If the affidavit does not convince the court that personal service is genuinely unworkable, the judge may dismiss the case rather than authorize alternatives. Dismissal is usually without prejudice, but a refiled case restarts the service clock without restarting the statute of limitations.
The stakes cut both ways once alternative service is authorized. A default judgment requires that the defendant was properly served and failed to respond, not that they were never told about the case.3Legal Information Institute. Federal Rules of Civil Procedure Rule 55 – Default and Default Judgment A defendant who later discovers a default entered on defective service can typically move to have it set aside. That is why courts examine these affidavits carefully before signing off — and why a thorough, specific record of what the process server did is worth the effort to build.