Can a Private Investigator Get Phone Records or Text Messages in the UK?

Updated 5 October 2026 by Investigation Bureau

No. In the UK a private investigator cannot lawfully obtain another person's phone records, call logs, text messages or live location, and anyone who offers to is offering to commit a criminal offence. Those records are held by the network for its account holder. Getting them by pretending to be the account holder is unlawfully obtaining personal data, intercepting calls or messages is an offence under the Investigatory Powers Act 2016, and getting into a handset, cloud backup or account without authority is an offence under the Computer Misuse Act 1990. The client who pays for it can be liable as well.

This guide explains why, what it risks for you, and the lawful routes that do exist. The offences apply across the UK. The court procedures are those of England and Wales, and Scotland has its own rules of evidence and procedure. It is general information, not legal advice.

Who holds phone records, and who may see them

A mobile network holds the billing record for each account: numbers called and texted, with dates, times and durations. It releases an itemised bill to the account holder, and to nobody else unless the law requires it. Message content does not appear on a bill, and a network cannot read messages sent through end-to-end encrypted apps. That content sits on the handsets and backups of the people in the conversation.

There is nowhere an investigator can lawfully ask for somebody else's records. A firm that produces them without consent or a court order has almost certainly invented them or committed one of the offences below.

The three offences behind the offer

Obtaining records by deception. Ringing a network and posing as the account holder, or paying someone on the inside, is obtaining personal data without the consent of the organisation that holds it. That is an offence under section 170 of the Data Protection Act 2018, which also covers procuring the disclosure for somebody else.
Interception. Intercepting a call, a voicemail or a message in the course of its transmission, without lawful authority, is an offence under the Investigatory Powers Act 2016.
Unauthorised access. Getting into a handset, a cloud backup, an email inbox or a messaging account without authority is an offence under the Computer Misuse Act 1990. Guessing a passcode, using a saved password and installing spy software all count.

Covert monitoring of a partner's phone can also amount to stalking or harassment, or form part of controlling or coercive behaviour. A strong suspicion, even a correct one, does not make any of this lawful.

What it risks for you as the client

A client who asks for unlawful methods or pays for them can face criminal liability alongside the investigator, and can be sued by the person whose privacy was invaded.

It also tends to damage the case it was meant to help. Courts in England and Wales have a discretion over improperly obtained evidence: it may be kept out, or admitted at a price in credibility and costs. Our guide to whether investigator evidence is admissible in court explains how judges approach it.

The lawful routes that do exist

Your own records. If the account is in your name, the itemised bill is yours to request from your provider.
A subject access request. Under UK GDPR you can ask any organisation, your phone provider included, for the personal data it holds about you. It never covers another person's.
Messages you were sent. If you are a party to a conversation, your copy is yours to keep and produce. Preserve it unedited on the original device.
A device examined with its owner's authority. A phone or laptop can lawfully be examined with its owner's written authority. An employer can do this with a device it owns, provided staff were told that work devices may be examined and the exercise is proportionate. A jointly owned family device is a grey area, and owning a handset is never authority to log in to somebody's personal email or cloud account.
A court order. In proceedings, a court can order a party to disclose relevant documents, which can include phone bills and messages. Against a third party mixed up in a wrong, such as a network or a platform, a court can make a Norwich Pharmacal order requiring it to disclose what it holds, typically who is behind a number or an account. It is applied for through a solicitor and granted only where disclosure is necessary and proportionate. It is not a way to read a partner's messages.
The police. Where a crime is involved, such as harassment, stalking or fraud, the police have statutory powers to obtain communications data from networks under formal authorisation. No private investigator has them.

What a lawful investigation can establish without phone records

The phone record is rarely the real question. Who somebody is meeting, where they go and who is behind a number can usually be established lawfully.

Surveillance in public places. Covert surveillance records where a person went, who they met and for how long, on timed and dated video.
Open-source research. Public profiles, company records and the open web often show connections a phone bill would only hint at.
Attributing a number or an account. A number that appears in adverts, business listings or public profiles can often be tied to a person or a business from public information alone, which is part of our cyber investigations work.

If the worry is a relationship, our guide to the signs of a cheating partner sets out what can lawfully be established.

Warning signs of a firm offering unlawful services

It advertises phone records, text retrieval, phone monitoring or live location for a number you supply.
It claims a contact inside a network, a bank or the police.
It offers to install software on someone else's handset, or to recover another person's deleted messages remotely.
It will not say in writing how the information will be obtained.
It has no company record you can check, and wants untraceable payment up front.

We refuse all of it: no interception, no access to accounts or devices without authority, no records obtained by deception, no tracker without a documented lawful basis and no tracing so that someone can be harassed.

Frequently asked questions

Can a private investigator get text messages or WhatsApp messages?

No. An investigator cannot lawfully take message content from a network, an app provider or another person's handset or backup. The lawful sources are a party to the conversation sharing their own copy, a device examined with its owner's authority, and disclosure ordered by a court.

Can a private investigator track a phone?

No. Location data held by a network is available to the police under statutory powers, not to private firms, and putting tracking software on someone's handset or logging in to their account is unauthorised access. An investigator can lawfully observe a person in public, and can track a vehicle where there is a documented lawful basis, as our GPS tracker law guide explains.

Can a private investigator hack a phone?

No. Getting into a phone, an email account or a cloud backup without the owner's authority is an offence under the Computer Misuse Act 1990, whoever does it. A person who pays for it can be liable too.

Can I see my partner's phone records if the account is in my name?

As the account holder you can ask the provider for the itemised bill for your own account, and that is as far as it goes. It gives you no authority to open another adult's handset, messages or online accounts, and using records to monitor or control a partner can itself be unlawful.

Ask what is lawful first. Tell an investigator what you need to find out and we will tell you the lawful route to it, with a fixed quote in writing before any work begins. The first conversation is free and confidential: start a confidential enquiry.

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