Police would like to speak to the man pictured after £20 was stolen from Morrisons in Preston.
A woman was paying for her products at a self-service checkout at the Morrisons Local in Blackpool Road, Ashton-on-Ribble, when she forgot to collect her £20 cash back.
The man, who was next in the queue, approached and took the money from the machine.
He is described as white, of a slim build, 50-55 years, short grey hair with grey facial hair.
Anyone with information is asked to call Preston Police on 101 or call Crimestoppers on 0800 555 111. No details will be taken and you won’t go to court.