People who have tampered with their car number plates are being warned they could be stopped and fined.
Police in Gloucester say they are coming across more vehicles with the numbers and letters altered.
A Gloucestershire Constabulary spokesman said the offenders usually do it to form names and other words.
He said it is an offence under the Road Vehicles Regulations Act to change the characters on number plates in any way. Offenders are fined £60.
Police Community Support Officer Steve Harris said: “I believe we’ve issued around 60 fines in the last six months, which is not a good sign.

Jon Cherry is a Director of leading personalised number plate dealer Regplates.com. Jon has over 25 years industry experience handling some of the most expensive plates ever sold with many high profile and celebrity clients. Active since 1991 in the number plate industry, Jon is currently Chairman of the Cherished Numbers Guild, a trade body representing number plate dealers in the UK. Jon has written many articles on the industry and insight into the future of numberplates and the market as a whole.