Last updated: 30/09/2025
More than 6.7 million motorists* in the UK - 16% of all drivers - are putting themselves and others at risk by providing false information on their car insurance forms, according to new figures from temporary car insurance provider, Tempcover.
And while stretching the truth is a tried and tested technique for some - from exaggerating on a CV for a new job to bending the rules to get a child into a good school - even a seemingly harmless fib on a driver’s car insurance form could leave motorists left without a safety net in the event of an accident, risking the very thing they thought they were protecting.
The new research of 2,000 drivers reveals that the practice of ‘postcode porkies’ and other deceptions is leaving millions vulnerable to having their policy voided in the event of a crash. Of the drivers who admitted to lying, the most common fib was about the car's overnight parking location (22%), for example, by claiming to have off-road parking or a private garage.
Amongst those who confessed to misinforming their insurer, one in ten respondents also admitted to providing a false home address (13%). Among those that gave a wrong address, two-fifths either used a previous home address which they have since moved from (41%) or a work address (39%), while others made use of a loved one’s home - such as a partner (24%) or their parents (20%), while some (7%) even went as far as using a random address.
These postcode porkies are being used deliberately by some to get cheaper insurance rates, as a fifth say they gave the wrong address on purpose to reduce premium costs (20%). Nearly half also confessed they don’t think it’s technically a lie if their parents still live at the address (41%).
It’s not just the address or overnight vehicle location either. Other fibs motorists admitted to include:
However, the study also uncovered a range of reasons behind the dishonesty including honest mistakes. Among those who provided incorrect information by accident, a quarter (25%) didn’t realise the information was wrong and the same number made a typing error, while more than a fifth (21%) miscalculated their vehicle usage, and 20% forgot to update their personal details about moving or changing jobs.
If an insurer discovers inaccurate information, they have the legal right to cancel or void the policy entirety. In fact, two-fifths of motorists who admitted to giving the wrong information (39%) have been caught, and of those, only a tiny 7% said nothing happened as a result.
Drivers who are caught face serious consequences:
Claire Wills-McKissick, a temporary car insurance expert at Tempcover explains why motorists need to be honest: “Insurers use your details - from your address to your driving history - to create a risk profile, and even a little white lie can break that trust and lead to a voided policy. This then leaves you without the safety net you thought you had, and without cover when you may need it most.
“There are plenty of legitimate ways to cut the cost of your insurance without bending the truth. These include adding a named driver, improving your vehicle’s security by adding anti-theft devices or securely parking it in a driveway or garage overnight.”
“It’s also worth having a think about whether an annual policy is the best option for you. If you only borrow a car occasionally, temporary car insurance is a great alternative. It’s a pay-as-you-go model that allows you to get cover for the exact time you need it, from an hour to a few weeks. That way, you're only paying for insurance when you’re actually driving, and keeping your policy valid too.”