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What "verified by a private investigator" means: how an address is checked before you act on it
Every people-search site, credit bureau product and tracing database can return an address against a name. Most of them will return one even when it is five years out of date, belongs to a namesake, or is a relative's house the person has never slept in. The difference between a result like that and one you can serve papers at, send enforcement agents to or write to about a debt is verification: a person with the training to tell a live trail from a stale one looking at the evidence and deciding whether it holds. At Trace Bureau that person is a private investigator, and no address leaves the building until one has done it. This guide explains what that means in practice, why it matters, and what to ask any tracing service about how its results are checked.
An address and a verified address are different things
A database holds entries. Each entry was true, or at least recorded, at some point: a form filled in, a registration, a bill, a listing. None of them updates itself when the person moves out. A lookup returns whatever matches the name you typed, ranked by whatever the software thinks is relevant, and presents it with the same confidence whether it is last month's or last decade's. That is a record, not a fact about where someone lives today.
The failure modes are well known to anyone who has done this work for a living:
- Stale entries. The person lived there, then moved. The entry stays.
- Namesakes. Two people with the same name and a similar age, one of whom is yours. A database does not know which.
- Registered but not resident. A parent's or partner's address used for post and paperwork while the person lives somewhere else.
- Copied data. One wrong entry that has been sold and resold until it appears in six places, which looks like six sources agreeing when it is one error repeated.
- Deliberate noise. Someone who does not want to be found and has left a trail that points the wrong way.
A verified address is one where a person has asked whether each of those is happening here, and has satisfied themselves it is not.
What a private investigator actually checks
We do not publish our sources or our method, for the same reason a good locksmith does not. What can be said is what the investigator is trying to establish before an address is released, because the questions are the same whoever asks them:
| Question | What it rules out |
|---|---|
| Is this the same person? Do the name, age, history, previous addresses and the people around them line up with the subject you described, and not with a namesake? | The wrong person |
| Is it current? How recent is the evidence that puts them there, and is there anything that suggests they have since moved on? | A stale entry |
| Do independent lines of evidence agree? Not the same fact repeated in several places, but different kinds of evidence pointing to the same door. | Copied data |
| Does the picture make sense? A person's address fits a life: work, family, the area they have always lived in, how they moved before. When it does not, the investigator asks why. | Registered-but-not-resident, deliberate noise |
This is judgement, built on experience of what false positives look like. Software can gather; it cannot be suspicious. The result of that judgement is a confidence rating and a date, which is what you receive.
Why it matters before you act
An address is rarely wanted for its own sake. It is wanted so that something can be done at it, and most of those things go wrong, expensively, at a wrong one.
| What you are about to do | What a wrong address costs |
|---|---|
| Serve a claim form | The rules on serving an individual expect you to take reasonable steps to find their current address. Serve at an old one and the judgment you obtain can be set aside, with the costs that follow. |
| Send enforcement agents | A visit to a house the debtor left two years ago is a wasted fee, and a distressing one for whoever lives there now. |
| Send a letter before action | A letter that sets out a stranger's debt lands on a stranger's mat. That is a disclosure of personal data to the wrong person, which is your problem as well as theirs. |
| Pay a beneficiary | Executors who pay the wrong person, or who cannot show they made proper efforts to find the right one, carry the risk personally. |
| Instruct a process server | Personal service at the wrong door is money spent proving the person is not there. |
The cheapest address is the one that is right first time. Checking an address is current before a letter before action covers the pre-action case in detail.
How Trace Bureau rates what it finds
Every report states the address at which the person is currently registered according to the records checked, the date it was verified, and one of three ratings:
- Confirmed: two or more independent current sources agree on the address.
- Probable: strong evidence from one current source with supporting indicators.
- Possible: the best available lead, which we say plainly rather than dress up, and which is never charged at the full fee unless you choose to take it.
The rating is the investigator's verdict on the evidence, not a score produced by software. It tells you how much weight the address can bear. A Confirmed address is one to serve at. A Possible one is a place to start a conversation with us about what else you know. Both are honest, which is the point of having them.
Who does the verifying
Trace Bureau was founded and is run by Kris Koos, a professional investigator with ten years in UK private investigation who has spent them locating people for solicitors, creditors, landlords and executors. Every instruction is read by a private investigator before any work starts, to check it has a lawful basis, and every address is verified by a private investigator before the report is released. It is the same service you would get by instructing a private investigator to find someone, because a private investigator runs it. What differs is the delivery: online instruction in five minutes, a fixed price, a dated and rated report within the time you chose, and nothing charged unless we deliver.
Tracing does not require a licence in the UK. It requires registration with the Information Commissioner's Office, a recorded lawful basis for every instruction, and the skill to tell a real address from a plausible one. The first two are on the company details page at the foot of every page. The third is what you are paying for.
What verification cannot do
Honesty about the limits is part of the service. A verified address is the address a person is currently registered at. In the great majority of cases that is where they live. Occasionally someone is registered at a family member's or a partner's address they do not sleep at, which is why the report carries a rating rather than a promise, and why organisations and professionals get a free re-check within 60 days. If the evidence shows the person has left the UK, we say so, and a UK trace that ends that way is not charged. If the evidence does not reach a current address at all, we say that too, and nothing is charged.
What to ask any tracing service
Whoever you use, these questions separate a verified address from a lookup:
- Who checks the result before it is sent, and what are they qualified to judge?
- Is the report dated, and does it say how strong the evidence is?
- What happens if the address is wrong? Is there a re-check, and who pays for it?
- Is anything charged if the person is not found?
- Is a lawful basis recorded for the instruction, and is the service registered with the ICO?
Trace Bureau's answers are: a private investigator; yes, Confirmed, Probable or Possible with the date; a free re-check within 60 days for organisations and professionals, and we look again for anyone; nothing; and yes to both. How to choose a tracing agent has the longer version.
When to instruct a verified trace
Whenever the next step costs money or carries risk if the address is wrong: before service, before enforcement, before a letter that sets out a debt, before a distribution. A Standard trace is £150, delivered within 3 to 5 working days, and Priority is £200, delivered within 2 to 3 working days. Firms instructing ten or more a month pay £120 per trace on a firm account. Nothing is paid at instruction; your card is only held, and it is charged only when a private investigator has verified the address. Instruct a trace.
Questions
What does "verified by a private investigator" mean on a Trace Bureau report?
That a qualified person, not software, has looked at the evidence behind the address and judged that it belongs to the right person and is current, before the report was released. The rating on the report (Confirmed, Probable or Possible) is that person's verdict on how strong the evidence is.
Is a people-search website result verified?
No. It is a match from a database, returned automatically, and it can be out of date, belong to a namesake or repeat one error from several places. It can be a useful starting point, but it is not an address to serve papers at or send enforcement agents to.
How accurate is a verified address?
A Confirmed address is one where two or more independent current sources agree, and in the great majority of cases it is where the person lives. The address reported is the one the person is currently registered at, which is why the report carries a rating and a date rather than a guarantee, and why there is a free re-check within 60 days for organisations and professionals.
Can I use the report as evidence of reasonable steps to find someone?
The report sets out the address, the confidence rating and the date it was verified. Many clients exhibit it to a certificate or statement of service, and a signed statement is available on request for organisations and professionals.
Does verification cost more?
No. It is part of every trace. A Standard trace is £150, delivered within 3 to 5 working days, and Priority is £200, delivered within 2 to 3 working days. Nothing is charged unless the address is found and verified.
Related guides
How accurate is an address trace?
No trace is certain, which is why a good one is rated and dated. What Confirmed, Probable and Possible mean, what causes errors, and how to act on each rating.
ReadTracing agent, private investigator or people-search site: which finds a UK address?
Three ways people try to find a UK address, what each costs and what you get. Why Trace Bureau is a private investigator's trace at a tracing agent's price.
ReadWhy free people-search sites rarely find a UK address
Free people-search sites are built for US records the UK lacks, so results are stale. The free routes that exist, and when a £150 trace is worth it.
ReadHow to check an address is current before sending a letter before action
A letter before action only works if it reaches the person. Signs an address is out of date, free checks and what they prove, and how a dated trace confirms it.
ReadTrace Bureau is a UK address tracing service run by a private investigator through a UK-registered limited company, and every address it reports is verified by a private investigator before release. This guide is general information, not legal advice. Prices correct at 23 Oct 2026.