Key takeaways
- Most scams aimed at trades follow a handful of patterns: overpayment refunds, absent buyers who want materials bought, changed bank details and bogus advertising renewals.
- Phishing is the most common cyber attack on UK businesses, so treat any message asking you to log in, pay or change details as suspect until checked.
- Never refund an overpayment until the original money has cleared and cannot be recalled, and never change payee details on the strength of an email.
- Verify a new enquiry with a call to a number you found independently, a real address and a site visit before buying materials.
- Write the checks into your office routine so they do not depend on one person's instinct.
Why trades are an easy target
Trade businesses publish a mobile number, answer unknown callers all day, take deposits by bank transfer and are used to customers who are vague about what they want. Those are good habits for winning work, and they are exactly what fraudsters rely on. Scams aimed at trades are rarely clever; they work because a busy owner is trying to answer a call while driving or reply to an email between jobs.
The wider picture is not reassuring. 43% of UK businesses reported a cyber security breach or attack in the latest government survey, and phishing was by far the most common type, hitting 38% of businesses[1][2]. For those attacked, phishing was also the most disruptive kind of incident for 69%[2].
Source: Department for Science, Innovation and Technology (GOV.UK), 2026[1]
Show the data
| Item | Value |
|---|---|
| Any breach or attack | 43% |
| Phishing | 38% |
The patterns that keep coming back
Fraud aimed at roofers, electricians, cleaners and gardeners tends to recycle the same few scripts. Learning their shape is more useful than memorising any single scam, because the details change every few months while the structure does not.
| Pattern | How it usually starts | Red flag | Safe response |
|---|---|---|---|
| Overpayment refund | A customer pays more than the deposit and asks you to send back the difference | Pressure to refund quickly; payment by cheque or a card you have never seen before | Refund nothing until the original payment has fully cleared; refund only to the original source |
| Absent buyer | An owner who is abroad or offshore wants work done and asks you to buy materials or pay a removal firm | Cannot meet, cannot show the property, wants you to pay a third party | Insist on a site visit and a deposit before any spend; never pay anyone on their behalf |
| Changed bank details | An email from a merchant, subcontractor or customer says their account has changed | Urgency, a slightly odd email address, a new account name | Call the person on a number you already hold before paying a penny |
| Bogus listing renewal | A call saying your directory or map listing is about to expire | Asks for card details on the call, vague about which directory | Hang up and log in to the platform directly to check |
| Official-looking demand | A text or email posing as HMRC, DVLA, a courier or your bank | A link to log in or pay, threats of fines | Go to the official site by typing the address yourself |
| Quote harvesting | Detailed requests for itemised quotes with no intention to buy | Will not give an address, asks for supplier names and prices | Give a range, not a parts list, until the job is real |
Red flags on the phone
A real customer can be awkward, rushed or vague. What separates a fraudster is usually a demand that moves money or information before you have seen the job. Teach office staff to pause the conversation when they hear any of these.
- The caller wants to pay more than you asked for, or wants to pay before you have quoted.
- They cannot or will not give a full address with a postcode, or the address does not match the area they describe.
- They ask you to buy materials, pay a supplier or hire a skip on their behalf before any deposit has reached your account.
- They want the job done urgently but cannot be present, and nobody else can meet you there.
- They ask for details about another customer, such as when you are next at an address or where a key is kept.
- They ring from a withheld number and refuse to give a number you can call back.
- They push you to move the conversation to a messaging app or personal email straight away.
A useful office rule: any request that moves money out of the business, changes payment details or shares customer information needs a second person or a call-back to a number you found independently.
A five-check routine before you commit time or materials
Match the address
Look up the postcode and check that the property type matches the job. A loft conversion enquiry for a ground-floor flat deserves a second question.
Call back on a number you chose
Ring the customer back on the number they gave, from your office line. For businesses and landlords, compare it with their website or Companies House record.
See the job
For anything beyond a small fixed-price repair, survey in person or by live video call before ordering parts.
Take the deposit first
Order materials only after a deposit has cleared into your account, and only for the job and address on the quote.
Keep a written record
Save the enquiry, your quote, the customer's acceptance and any payment confirmations in the job file.
These checks cost a few minutes on a genuine job and stop most fraud cold. They also protect you against a less dramatic problem: customers who never intended to go ahead and leave you with unreturnable stock.
Reviews, ratings and fake feedback
Some scams target your reputation rather than your bank account: offers to sell you batches of five-star reviews, or threats to post bad ones unless you pay. Government research estimated that 11% to 15% of reviews in common product categories on e-commerce platforms used by UK consumers were fake[3]. Since the Digital Markets, Competition and Consumers Act 2024, fake reviews and concealed incentivised reviews are banned practices, with guidance from the Competition and Markets Authority[4].
That gives you a clear answer to anyone selling reviews: no. If you receive a threat, keep the messages, report the review through the platform's own process and do not pay. Genuine reviews come from asking real customers at the right moment, which is slower but safe.
Protecting your customers from impersonation
Fraudsters also use your business as a disguise. A caller may pretend to be your office to a customer, asking for a deposit to a new account, or pretend to be a customer to your office, asking when the engineer will next be at an address or how to get into a property with a key safe. Both attacks rely on the same gap: nobody checking who is on the other end.
- Tell customers in your booking confirmation that you will never ask them to pay into a different account by phone or text, and give them the one number to ring if anyone does.
- Never give out a customer's address, appointment time, alarm code or key safe code to an incoming caller. Ring the customer back on the number in your system instead.
- Put your bank details on your invoice template once, and treat any later request to change them, from anyone, as suspicious until confirmed by phone.
- Ask engineers to carry ID and to mention a detail from the booking at the door, so vulnerable customers can tell a genuine visit from a bogus one.
Training the office in ten minutes
You do not need a course. Put the six patterns from the table on one sheet, pin it by the phone and run through it at a team meeting every few months. Ask each person to describe one odd call or email they have had since the last meeting. Real examples from your own inbox stick far better than generic warnings, and the habit of mentioning odd contacts is what catches the next one early.
Example: the offshore landlord
Example (fictional). A sole-trader roofer in Swansea receives an email from someone who says he owns a terraced house in the city but is working on a rig. He wants the roof stripped and re-tiled, will pay the full quote upfront, and asks the roofer to pay a scaffolding firm he has already chosen from the money. A payment notification arrives that afternoon for more than the quote.
The roofer checks his banking app rather than the email and sees no cleared funds. The scaffolding firm has no website and a mobile number only. He replies that he will need to survey the roof and meet a key holder, and that he only pays suppliers he has chosen himself. The emails stop. Had he paid the scaffolder, the original payment would never have arrived and he would have been out of pocket for the transfer.
If you think you have been caught
- Ring your bank's fraud line immediately using the number on your card or their website; the faster they act, the better the chance of stopping a transfer.
- Change any password you typed into a suspicious page, starting with email and banking, and turn on two-step verification.
- Report the fraud to the police fraud reporting service for your nation, keeping screenshots, emails and phone numbers.
- Warn your merchants and regular subcontractors if the scam involved changed payment details, in case they are next.
- Tell your staff what happened, without blame, so the pattern becomes part of everyone's training.
Most of this is ordinary office discipline. Written down once and repeated often, it protects your time, your money and your customers' trust.
Frequently asked questions
What is the overpayment scam aimed at tradesmen?
A fake customer sends more than the agreed deposit, often by cheque or a stolen card, then asks you to refund the difference. The original payment later bounces or is reversed, and the refund you sent is lost.
How can I tell a fake job enquiry from a real one?
Real customers will give a full address, take a call back on their own number and let you see the job. Be wary of anyone who wants you to buy materials or pay a third party before a deposit has cleared.
Someone emailed to say a supplier's bank details have changed. What should I do?
Do not pay to the new details. Call the supplier on a number you already hold, not one in the email, and confirm the change with someone you know.
Is it legal to buy reviews for my trade business?
No. Fake reviews and concealed incentivised reviews are banned practices under the Digital Markets, Competition and Consumers Act 2024.
References
Department for Science, Innovation and Technology (GOV.UK) (2026). Cyber Security Breaches Survey 2025/2026 (opens in a new tab) ↑
Department for Science, Innovation and Technology (GOV.UK) (2026). Cyber Security Breaches Survey 2025/2026 (opens in a new tab) ↑
Department for Business and Trade (GOV.UK) (2023). Fake online reviews research: executive summary (opens in a new tab) ↑
Competition and Markets Authority (2025). Fake reviews guidance (CMA208) (opens in a new tab) ↑