Skip Trace for an Affidavit of Diligent Search
Before a court will let you serve a defendant by publication or another form of constructive service, it wants proof that you tried, hard, to find and personally serve them first. A one-line “could not locate” will not survive scrutiny. What holds up is a documented, dated, multi-source search performed with real diligence and written down source by source. That is the work we do: our investigators run the lawful locate and hand you the itemized trail your affidavit of diligent search stands on, whether the search ends in a fresh serviceable address or in a defensible record that the person truly cannot be found. We do not serve papers or give legal advice; we supply the research your process server or attorney relies on.
The Short Version
An affidavit of diligent search (also called a diligent search and inquiry) is the sworn statement that tells a judge you made a real, good-faith effort to find and serve a party before asking to serve them by publication or another constructive method. Courts do not accept a bare conclusion; they want the specific steps, the sources checked, the dates, and the results, including the dead ends. People Locator Skip Tracing runs that search for you: a lawful, multi-source locate across current-address data, public records, and known associates, documented source by source so it can back a sworn affidavit. Two outcomes both help you. If we surface a current, serviceable address, your process server can attempt personal service, which courts always prefer. If the person genuinely cannot be found after a thorough search, you hold the itemized record that supports a motion for service by publication. We do the research; your attorney drafts and signs the affidavit and the court decides.
Watch: The Search Behind the Affidavit
What a diligent search really requires, and how the trail gets built.
Watch Overview
What an Affidavit of Diligent Search Is
And why the search behind it is the part that actually matters.
An affidavit of diligent search and inquiry is a sworn statement, signed under penalty of perjury, in which the person who conducted the search tells the court exactly what they did to locate and serve a party and what they turned up. It is the evidentiary foundation for constructive service, most commonly service by publication, where notice is published in a newspaper or posted rather than handed to the defendant in person. Constructive service is a due-process compromise: the court allows it only because the ordinary method, personal delivery, has been shown to be genuinely impossible after real effort. The affidavit is how you make that showing.
The critical thing to understand is that the document is only as strong as the search behind it. Judges have seen boilerplate affidavits that recite “diligent search was made” and nothing more, and those get rejected because they prove nothing. What a court is looking for is the specific record: which databases and public records were checked, which addresses and phone numbers were attempted, who was contacted, on what dates, and what each step returned. Appellate courts have repeatedly held that there is no single mandatory checklist for what counts as due diligence; instead, sufficiency is judged case by case on whether the searcher used the information reasonably available and followed the leads it produced. That standard rewards a thorough, itemized search and punishes a thin one, which is precisely why the locate work should be done properly and written down as it happens.
Skip Trace vs. Diligent Search
They overlap, but a diligent search has a higher bar.
People use “skip trace” and “diligent search” as if they are the same thing, and in practice one contains the other. A skip trace is the broad locate: pull every current identifier for a person, chase the strongest lead, and return an address or a phone number. Speed and a good hit are the whole goal. A commercial skip trace answers a business question, and it does not necessarily care how the answer is documented as long as the answer is right.
A diligent search for a court raises the bar in two ways. First, it has to be exhaustive rather than sufficient: it is not enough to find one plausible address and stop, because if the search ends without personal service, the affidavit must show that the reasonable avenues were actually worked, not just the fastest one. Second, it has to be documented as evidence, meaning each source, attempt, date, and result is recorded so a judge can evaluate the effort rather than take it on faith. In other words, a diligent search is a skip trace performed to an evidentiary standard and written up like one. When we take a matter for an affidavit of diligent search, we run the full locate and preserve that record from the first query, so nothing has to be reconstructed later from memory. If your only need is a fast address rather than a court-ready trail, our general skip tracing services may be the better fit; if the search has to stand up in a motion, this is the process built for it.
What a Defensible Search Includes
The avenues courts expect to see worked, not just listed.
Current and Prior Addresses
We build the address timeline from multiple current-address sources, then confirm which is live now rather than a stale record. Old, disconnected, and forwarding addresses are noted too, because the trail of where a person is not is part of the diligence.
Court, Property, and Voter Files
Real property and assessor records, recorded documents, voter registration, licensing, and civil and criminal court filings often carry a usable address or a fresh lead when the obvious ones are dead. Each is checked and the result logged.
Relatives and Known Associates
People rarely disappear cleanly. Relatives, prior co-residents, and business associates are identified and, where lawful and appropriate, form leads toward a current location the subject’s own records no longer show.
Phone and Digital Footprint
Current phone numbers, email, and open-source and social signals are checked for a location or a live line of contact, treated as investigative leads to verify rather than as proof on their own.
Employer and Business Ties
A place of work or an owned entity can be a serviceable address in its own right, and it is one of the avenues a court expects a diligent searcher to have considered before concluding a person cannot be found.
Dated, Source-by-Source Log
Every source, every attempt, every date, and every result, including the negatives, is captured as we go. That log is the substance your affidavit describes and the reason it reads as diligence rather than assertion.
Why Affidavits Get Rejected
Most failures trace back to a thin or undocumented search. Watch for these.
Bare Conclusions
“A diligent search was made and the defendant could not be found” states a result with no steps. A court cannot evaluate an effort it cannot see.
Ignored Known Leads
If you already had a phone number, an email, or a relative’s name and did not use it, the search is not diligent no matter how many databases you ran.
One Source, Then Stop
Running a single database, getting a miss, and calling it done reads as convenience, not diligence. Courts expect the reasonable avenues to be worked.
No Dates or Details
An affidavit without when each step happened, what was checked, and what came back is hard to defend if the other side challenges service later.
Skipping Personal Service
A found current address means personal service should be attempted first. Jumping to publication when the person was locatable invites a challenge.
Reconstructed From Memory
Writing up the search weeks later, from recollection, produces gaps and errors. A contemporaneous, source-by-source log avoids that entirely.
How the Options Compare
What actually backs a court-ready affidavit of diligent search.
| Approach | What You Get | Holds Up in a Motion? |
|---|---|---|
| Free online lookup | One or two possibly stale hits, no sourcing, no dates. | No. Reads as a conclusion, not a search. |
| Single-database skip trace | A fast address if it hits; nothing if it misses. | Weak. One source is rarely “diligent.” |
| Process server locate add-on | Search bundled into serving; documentation varies widely. | Sometimes. Depends on how it was recorded. |
| People Locator Skip TracingBuilt For This | Multi-source lawful locate with a dated, itemized, source-by-source trail, whether it ends in an address or a documented dead end. | Built to. The record is the point. |
The distinction that matters is not who runs the query but whether the effort is exhaustive and preserved. A process server who also serves the papers may do excellent locate work, and many do; but the search and the service are two separate jobs, and a firm whose focus is the lawful research can devote the diligence and the documentation the affidavit lives on. If you also need someone to effect service once we hand over the address, our guide to how you can find a process server to serve papers walks through that side.
How the Search Runs
From your intake to a trail your affidavit can cite.
Send What You Have
Full name, any known aliases, last-known address, date of birth if you have it, and every prior identifier already in your file, phone numbers, employers, relatives. We start from what you know.
We Run the Multi-Source Locate
Our investigators work current-address data, public records, associates, contact data, and employment across sources, following each lead the last one produces rather than stopping at the first miss.
We Verify and Document
Promising addresses are confirmed as current where possible, and every source, attempt, date, and result is logged as we go, including the dead ends, so the trail is contemporaneous.
You Get an Address or a Record
Either a current serviceable address for your process server to attempt personal service, or a documented, exhaustive search that supports a motion for service by publication. Your attorney drafts and signs the affidavit.
Because the record is built from the first query rather than reconstructed afterward, there is nothing to rebuild if opposing counsel later challenges service. For a legitimate, permissible-purpose matter, an initial locate typically comes back within 24 hours, though a fully worked exhaustive search for a difficult subject takes longer by its nature. If you also need to confirm a last-known address before we begin, our reference on how a current address is verified shows what a confirmed locate involves.
Both Outcomes Help Your Case
A found address and a documented dead end each move the matter forward.
Outcome one: we find a current, serviceable address. This is the better result for almost every case. Personal service is the gold standard, it is the least vulnerable to a later challenge, and it puts the actual defendant on notice, which keeps your judgment clean. When our search surfaces a live address or workplace, the file goes to your process server for a personal-service attempt, and the diligent-search work becomes the backstop rather than the main event. A confirmed locate here is also what makes it possible to serve a lawsuit on a defendant who moved instead of resorting to constructive service at all.
Outcome two: the person genuinely cannot be found. Some subjects truly cannot be located after a thorough search, and when that is the honest result, the exhaustive documented trail is exactly what your motion for service by publication needs. The affidavit describes the avenues worked, the sources checked, the attempts made, and the dates, and it shows the court that constructive service is warranted because ordinary service was tried and failed. In both outcomes the deliverable is the same underlying thing, a lawful search that was actually performed and actually written down. What differs is only whether it ends in an address or in a defensible record of absence. When the subject is a business rather than an individual, the analysis shifts to registered agents and entity filings; our guide on how to serve an LLC or corporation covers that path.
Who We Support
The people who file the motion and the ones who serve the papers.
Attorneys
The documented search behind the motion
Paralegals
Locate work that saves the file
Process Servers
A fresh address to attempt service
Plaintiffs
A defendant who cannot be found
Family Firms
Divorce and custody service by publication
Collections Counsel
Locate a debtor to serve or subpoena
Whatever seat you are in, the ask is the same: a lawful locate you can stand behind. Firms come to us with quiet-title actions, foreclosures, family-law matters, contract suits, and probate cases, all of them stalled at the same point, a party who has to be served and cannot be found. The federal framework for service of process, including when courts permit alternatives to personal delivery, is set out in the United States Courts rules of civil procedure, and state courts apply their own diligent-search standards on top of it. Our part sits underneath all of it: the research. If you also need to locate a person connected to the matter but not the defendant, our page on locating a witness for testimony covers that adjacent need.
What We Do, and What We Don’t
Clear lines so you know exactly what you are getting.
We are a lawful skip-tracing and public-records research firm. We locate people and document the search, working only for permissible purposes, and litigation is one of the clearest permissible purposes there is. That is the whole of our role, and stating its limits plainly is part of doing it well. We do not serve papers. Effecting service is the job of a licensed or authorized process server, and it is a separate engagement from the locate. We do not give legal advice. Whether service by publication is proper in your matter, what your jurisdiction’s diligent-search standard requires, and how the affidavit should be drafted are questions for your attorney; we supply the research it rests on, and your counsel drafts and signs the sworn statement. We do not access anything unlawfully. Every source we touch is a lawful, permissible-purpose one, and the strength of a search that has to survive a challenge depends on it having been clean from the start.
Everything on this page is general information about how a diligent search supports constructive service, not legal advice about your case. Requirements vary by jurisdiction and by the type of action, and the court makes the final call on whether the search you present is diligent enough. What we can promise is the part we control: a real, lawful, thoroughly documented locate that gives your affidavit something solid to describe.
Our Commitment
We run the search, and we write it down. Whether it ends in a current serviceable address or a documented, exhaustive dead end, you get a lawful, source-by-source trail your affidavit of diligent search can stand on, never a bare conclusion. Honest, permissible-purpose skip tracing since 2004.
Frequently Asked Questions
What is an affidavit of diligent search?
It is a sworn statement in which the person who ran the search tells the court exactly what they did to find and serve a party, and what each step returned. It is the evidentiary basis for constructive service, usually service by publication, which a court permits only after ordinary personal service has been shown to be impossible despite real effort.
Do you serve the papers or file the affidavit for me?
No. We run the lawful locate and provide the documented search trail. Serving the papers is the job of a process server, and drafting and signing the affidavit is your attorney’s, on your counsel’s judgment about your jurisdiction. We supply the research that both rely on.
How is a diligent search different from a regular skip trace?
A regular skip trace aims for a fast address and does not necessarily preserve how it got there. A diligent search for a court has to be exhaustive rather than merely sufficient, and documented as evidence, with each source, attempt, date, and result recorded so a judge can evaluate the effort. It is a skip trace performed to an evidentiary standard.
What does a court consider a diligent enough search?
Courts generally judge diligence case by case rather than against a fixed checklist. The question is whether you used the information reasonably available and followed the leads it produced, checking the sensible avenues such as address history, public records, associates, contact data, and employment, and whether you documented all of it. A thin or single-source search rarely qualifies.
What if you actually find the person?
That is the better outcome. When we surface a current, serviceable address or workplace, your process server can attempt personal service, which courts always prefer and which is the least vulnerable to a later challenge. In that case the diligent-search documentation becomes a backstop rather than the basis for publication.
What information should I send to start?
Send the full name, any known aliases, the last-known address, date of birth if you have it, and every prior identifier already in your file, such as phone numbers, employers, and relatives. The more you provide, the more leads we can work, and using the information you already had is itself part of what makes a search diligent.
Is skip tracing for litigation lawful?
Yes. Locating a party to effect service or a subpoena is a clear permissible purpose, and we work only lawful, permissible-purpose sources. That clean sourcing is also what lets a search survive a challenge, since a locate built on anything improper would undermine the very service it was meant to support.
How fast can you turn around a locate?
For a legitimate matter, an initial locate typically comes back within 24 hours. A fully worked exhaustive search for a difficult subject takes longer by its nature, because diligence means following the avenues to their end rather than stopping at the first result.
Related Guides
More ways our investigation team can help.
- Locate a Defendant for Service by Publication
- Find a Defendant Before the SOL Runs Out
- Locate a Co-Defendant Who Was Never Served
- Locate a Vanished Tenant to Serve Eviction Papers
- Find a Defendant to Serve a Restraining Order
- Find a Defendant for a Wrongful-Death Lawsuit
- Locate Class Members for Class-Action Notice
Need the Search Behind Your Affidavit?
We run the lawful, multi-source locate and hand you the dated, itemized trail your affidavit of diligent search stands on, an address for personal service or a documented record for publication. Contact us to get started.
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