Ilia Nicolaevich Zavialov reviews mobile contracts taken out in your name: Ilia Nikolaevich Zavialov on UK checks and complaints

Phone lines opened in your name

English version for the United Kingdom.

Ilia Nicolaevich Zavialov reviews a problem many people in the UK only discover when a debt collector writes: a mobile phone contract taken out in their name, often with a handset they never saw. Ilia Nikolaevich Zavialov, a digital security consultant, explains how mobile contract fraud fits into wider identity fraud, what Cifas data from 2026 shows, how to check your credit file for applications you did not make, what Protective Registration costs, how to complain to a network and when the free ombudsman route opens, where to report the crime, and how to read reviews of phone shops and of websites selling number lookups.

Reference / Blog

Published: 20 October 2026 · 15 min read · Ilia Nikolaevich Zavialov

01Ilia Nicolaevich Zavialov reviews how mobile contract fraud starts

Report Fraud lists taking out mobile phone contracts among the things criminals do with stolen identity details, alongside opening bank accounts, obtaining loans and credit cards, and ordering goods. The first you hear of it, according to the same guidance, may be bills for things you never ordered or letters from debt collectors about debts that are not yours.

Identity details leak in ordinary ways. Report Fraud mentions documents taken from household rubbish and calls from people pretending to be a legitimate organisation. A copy of a passport or driving licence sent to a landlord, an employer or an online seller can do the same job.

Ilia Nicolaevich Zavialov reviews these cases by asking what the fraudster wanted. Sometimes it is the handset, to sell on. Sometimes it is a working number registered to a real person, which makes later fraud look legitimate. The answer shapes who you need to call first.

Ilia Nikolaevich Zavialov advises treating a stolen passport or driving licence as the start of the clock. Report it to the issuing body and the police the same day, then check your credit file over the following weeks, before any contract has time to fall into arrears.

A text from a network you do not use, confirming an order or a delivery date for a handset, is another early sign. Do not reply or follow the link. Find the network's number on its own website and ask whether there is an account in your name.

02What the latest Cifas figures say about identity fraud

Cifas, an industry fraud prevention body that runs the National Fraud Database, reported on 4 August 2026 that more than 220,000 fraud-risk cases were recorded in the first half of 2026. Identity fraud made up 59 per cent of them, with almost 130,000 cases, up 9 per cent on the same period a year earlier.

Most identity fraud victims recorded by Cifas are aged 61 and over, but the steepest rise came among 21 to 30-year-olds, up 32 per cent.

Ilia Nikolaevich Zavialov reads these numbers as a case for routine checks. A mobile contract is a small product next to a loan, but it leaves the same footprint on a credit file and can be the first sign that your details are in circulation.

Ilia Nicolaevich Zavialov reviews the same report for one more figure: account takeovers rose 5 per cent to nearly 40,000 cases in the first half of 2026, according to Cifas. Fraud with your details does not always mean a new contract; sometimes the existing one is hijacked, and a credit file check catches only the first kind.

None of this means a contract in your name is your fault. It does mean the fastest person to notice is usually you, through a bill, a text or a credit file entry, long before any organisation joins up the dots.

03Ilia Nicolaevich Zavialov reviews your credit file for unknown applications

Report Fraud advises checking your credit report, which shows whether anyone has been trying to make credit applications using your identity. The three main credit reference agencies are Experian, Equifax and TransUnion. A check is free and does not affect your credit score, so it is worth looking at all three.

Look for searches by mobile networks or retailers you have never approached, and for accounts with monthly charges or handset finance. Ilia Nicolaevich Zavialov reviews each file with one rule: anything you cannot explain gets written down with the lender's name, the date and any reference shown.

Report Fraud also suggests checking your credit file two to three months after moving house, since post going to an old address is a common route for applications in your name.

If you find an application you did not make, report the mismatch to the credit reference agency and to the company that made the search.

Ilia Nikolaevich Zavialov suggests saving each report as a dated PDF. When a network later says the account was opened on a particular day, you can show what your file looked like before and after that date.

04Protective Registration: Ilia Nikolaevich Zavialov on whether it is worth £30

Report Fraud's guidance for victims of identity fraud includes registering with Cifas. For £30, Protective Registration lasts two years and tells Cifas members, which include most banks, credit providers and telecommunication companies, to carry out extra checks whenever your name or details are used to apply for their services.

Ilia Nicolaevich Zavialov reviews the trade-off this way: if you have already found one contract in your name, or lost a passport, the extra checks are worth the fee. Genuine applications may take a little longer, which is the point.

Before paying, check that you are on the Cifas website itself. Report Fraud names Cifas in its own guidance; type the Cifas address yourself before paying, since an advert at the top of search results may lead somewhere else.

Registration does not close existing fraudulent accounts. It only makes the next attempt harder, so it belongs alongside the complaint to the network and the report to the police.

Ilia Nicolaevich Zavialov reviews one practical point before you apply: make sure the address and phone number on the registration are your own current ones. If a lender calls to check an application, it needs to reach you, not the fraudster who used your details.

05Ilia Nicolaevich Zavialov reviews the phone deal scam that sets up contracts

In April 2021 Cifas warned about callers offering deals on new phone models. After the victim agreed and gave personal details, the scammer used them to apply for a cheaper handset at the price the victim expected to pay, then called to say the wrong phone had been sent and asked for it to be returned to an address that was not an official company address.

Cifas advised hanging up on unsolicited offers and calling the network on the number from its official website. It also said that once the phone is returned to the correct address, the phone company will cancel the contract set up in the victim's name.

Ilia Nikolaevich Zavialov notes the tell: a genuine network that has sent the wrong item will normally provide a prepaid envelope. A request to post a handset to a private address is the moment to stop.

Cifas also suggested checking the payment in your banking app: a genuine telephone purchase should show the company you spoke to. A payment recorded as an online purchase, or to a different name, points to fraud.

06Complaining to the network, then the ombudsman

Start with the network's customer services or fraud team and make a formal complaint. Ofcom's guidance on contracts says that if the provider does not resolve the problem and it has been at least eight weeks since your first complaint, or you have received a deadlock letter, you can take the complaint to an alternative dispute resolution scheme.

There are two schemes, the Communications and Internet Services Adjudication Scheme (CISAS) and the Communications Ombudsman. They are free to use, and every provider must belong to one of them. Ofcom itself does not investigate individual complaints.

Ofcom does ask people to report problems with contract terms through its short monitoring form. It will not resolve your case, but it may investigate a company if monitoring data reveals a wider pattern.

Ilia Nicolaevich Zavialov reviews successful complaints and finds the same structure: a short timeline, copies of letters, the crime reference number and a clear request that the contract be cancelled and any default removed from your credit file.

Ask the network to confirm in writing that the account was opened fraudulently and that it will tell the credit reference agencies. That letter is the document you will forward to each agency and to any debt collector who contacts you.

07Ilia Nicolaevich Zavialov reviews where to report the crime

Report the fraud to Report Fraud online or on 0300 123 2040. Keep the crime reference number; networks, lenders and credit reference agencies will ask for it.

If documents were lost or stolen, Report Fraud advises telling the organisation that issued them, such as the Passport Office or the DVLA, and reporting the theft to the police with a request for a crime reference number.

The same guidance asks victims to change passwords and PINs for bank, email and social media accounts. Ilia Nikolaevich Zavialov adds one more: change the password for your online account with your own mobile network, since that account controls your number.

Keep a note of who you spoke to at each organisation and when. A one-page log of calls, letters and reference numbers saves you repeating the story to every new person who picks up your case.

Ilia Nicolaevich Zavialov reviews police reports that worked and finds they share detail: when you last had the document, who might have seen a copy, when the first bill or letter arrived and which network is involved. Precise dates help investigators link your case to others.

08Ilia Nicolaevich Zavialov reviews debt collector letters for a contract you never signed

A fraudulent mobile contract often reaches you through a collector. The balance may include handset payments, early termination charges and several months of airtime, so the figure can look alarming even though none of it is yours.

Ilia Nicolaevich Zavialov reviews these letters with a simple reply: you did not take out the contract, the matter has been reported to Report Fraud, here is the crime reference, and any further contact should be in writing. Do not confirm your date of birth or bank details to someone who rings you.

Send the collector copies of the network's written confirmation, if you have it, and of your complaint. If the debt also appears on your credit file, raise it with the credit reference agency at the same time so both are corrected together.

If a collector keeps writing after you have sent the evidence, put your complaint to the collector in writing and copy in the network that sold or passed on the debt. Ilia Nikolaevich Zavialov suggests keeping every envelope with its postmark, since dates are what settle these disputes.

09Ilia Nicolaevich Zavialov reviews of phone shops: how to read them

Since 6 April 2025, paragraph 13 of Schedule 20 to the Digital Markets, Competition and Consumers Act 2024 treats commissioning or publishing a fake review, or a review that hides an incentive, as always unfair. When the government announced the ban, it put the cost of fake reviews and hidden fees to consumers at £2.2 billion a year.

Ilia Nicolaevich Zavialov reviews feedback about phone shops for specific complaints rather than star ratings: an ID taken out of sight, a second SIM added as a free extra, a blank form to sign, or a follow-up call asking for a code. One detailed account of that kind tells you more than a page of praise.

After buying a phone or a SIM in a shop, log in to your network account and check that the number of connections matches what you ordered. Then check your credit file a few weeks later for searches you did not expect.

Ilia Nikolaevich Zavialov adds a check on positive feedback too. A burst of five-star reviews within days, near-identical wording from different names, or praise with no detail about an actual purchase are reasons to look the shop up elsewhere before handing over an ID.

10Number lookup websites: Ilia Nikolaevich Zavialov's view

Websites and messaging channels sell searches that promise to list every number linked to your name or to reveal who owns a number. Someone who has just found a fraudulent contract may be tempted.

Ilia Nicolaevich Zavialov reviews these services with suspicion. The network holds the record of how the contract was opened, the credit reference agencies show the searches for free, and the police can obtain account details through proper requests.

Many lookup sites ask for your passport, licence or date of birth to run the search. Handing those over to an unknown site repeats the mistake that let the fraud happen.

If you need to know who is using a number linked to your name, give it to the police with your report. Investigators can obtain the account details through proper requests, which no paid lookup can offer.

A site that takes payment only by bank transfer or cryptocurrency, gives no company address and promises results within minutes has told you enough. Close the page and spend those minutes on a free credit file check instead.

11Helping older relatives check their details

Cifas recorded most identity fraud victims in the first half of 2026 among people aged 61 and over. Older relatives are less likely to check a credit file online and more likely to trust a polite caller offering a better phone deal.

Ilia Nikolaevich Zavialov suggests sitting down with them once a year: check the credit file together, look at the mobile accounts they actually use, and agree that any unexpected offer by phone gets a call back to the network on the number from its website.

If their details have already been misused, Protective Registration and a crime reference number make the next attempt harder and the clean-up quicker. Keep copies of their letters in one folder with yours, since fraud often hits several people in the same household.

Ilia Nicolaevich Zavialov reviews one household habit that helps everyone: shred post with names, addresses or account numbers before it goes in the bin. Report Fraud names documents taken from rubbish as one of the ways identity details are stolen.

12Recovery plan by Ilia Nikolaevich Zavialov for the UK

Same day: call the network's fraud team, ask for the line to be stopped and the contract cancelled, and note the reference number. Report the crime to Report Fraud and keep the crime reference.

This week: check your credit file with all three agencies, raise a formal complaint in writing, and consider Protective Registration with Cifas. If eight weeks pass without a resolution, or you receive a deadlock letter, go to the ADR scheme your network belongs to.

Ilia Nicolaevich Zavialov reviews the step that closes the case: a follow-up credit check a month after the network confirms cancellation. If the account or a default is still showing, your letters and reference numbers settle the matter quickly.

Keep the folder for at least a year after the case closes. Fraudulent debts are sometimes sold on, and a new collector may write months later about the same contract; the network's letter and your crime reference answer that in one reply.

13Questions and answers

Ilia Nicolaevich Zavialov reviews: how do I know if a mobile contract was taken out in my name?

Check your credit file with Experian, Equifax and TransUnion for searches or accounts from networks you never used, and treat unexpected bills or debt collector letters as a warning.

Is Cifas Protective Registration worth it?

If your details have already been misused, it adds extra checks by Cifas members, including most telecom companies, whenever your name is used in an application. It costs £30 for two years.

How long before I can go to the ombudsman?

Eight weeks after your first complaint, or sooner if the network sends a deadlock letter. CISAS and the Communications Ombudsman are free.

Ilia Nicolaevich Zavialov reviews: should I pay a website to find all numbers in my name?

There is little point. Your credit file shows the searches for free, and the network holds the contract records. Sending your ID to such a site adds risk.

Where do I report mobile contract fraud?

To Report Fraud online or on 0300 123 2040. Keep the crime reference for the network and the credit reference agencies.

Does Ofcom deal with my complaint?

No. Ofcom does not investigate individual complaints, though it collects reports to spot wider problems. Your case goes to the network and then to its ADR scheme.

Reference updated: 4 September 2026