Police are appealing for information following an incident at the Costa Coffee Drive-Thru near Junction 16 of the M4.
Between 4.45pm and 5pm on 23 March 2017, two men entered the shop in Lydiard Fields and within five minutes of each other, ordered coffee to takeaway.
Both men paid with counterfeit £50 notes.
It is believed the pair were known to each other.
The CCTV images are of two men that the police would like to speak to in connection with this incident.
Anyone with information should call police on 101 or Crimestoppers anonymously on 0800 555 111.
