Detectives are keen to speak to Tim Daley, 48, as part of their investigation into the raids at World Travel Lounge in Fleetwood. He is described as white, 5ft 11in tall, and has links to the Fleetwood and Cleveleys areas.
Officers from Lancashire Constabulary were called to the branch at 10.37am on Tuesday (September 21) following reports of a robbery.
The force said a man passed a note to a member of staff, in which he claimed to have a gun and demanded money. No weapon was seen and the individual left with a large quantity of cash.
On Wednesday (September 22), officers were called to a report of a further robbery at the same store. A man is alleged to have gone into the store and brandished a knife, threatened staff and demanded money. He left with a large quantity of cash.
Since the two incidents, which are being treated as linked, World Travel Lounge closed the targeted store along with its Blackpool Hounds Hill and Cleveleys branches.
A man was initially arrested by police in connection with the offences, but was later released with no further action to be taken.
Detective constable Ryan Morrison, of Blackpool CID, urged anyone who may have seen Daley to contact the police. "We would urge anyone who has seen him, or knows where he is, to call police," he added. "He should not be approached in any circumstances."
Anyone with information can contact police on 101. For immediate sightings please call 999 providing a location and description.
