Gwent Police is appealing for information following the theft of £50 from a self-service till at the Asda store in Blackwood on April 20.
Officers are trying to trace the man pictured as he could hold information that could assist the investigation.
Anyone with any information can call Gwent Police on 101 quoting log 80 20/04/15.
How can someone steal cash from a self-service till?
If someone asked for cashback but forgot to take it from the note dispenser then the next person could just pick it up.