A cash machine in Northamptonshire swallowed a bank card and shut down without dispensing the requested money.
Although when the victim checked with the bank later on, it showed that money had been released from the machine, which was outside the Co-op store, in Stocks Hill, Moulton.
Police have now released photos of two men they want to speak to who were at the cash machine shortly beforehand.
Officers say the men may have experienced a similar problem with the machine or may have information relating to the incident.
Officers are keen to speak with them, or anyone who may recognise them.
Anyone with any information can call Northamptonshire Police on 101. Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111.