On Tuesday night police were called to Cosmo Bingo in Eccles, Greater Manchester, to investigate reports that a woman was using stained bank notes to play on gaming machines.
This led to a bingo hall customer being arrested on suspicion of money laundering.
Staff said several people had spotted a woman putting cash into machines, playing them briefly, then collecting the remaining credit.
DCI Clare Devlin, said: “This was a clear attempt to launder stolen money and pleasingly we have been able to put a halt to this criminality due to the diligence and vigilance of those inside the bingo hall.
“A stolen, stained bank note can now tell us an awful lot, and so to be able to recover some is significant.
“We will be conducting an investigation into how this money came into the woman’s possession, and where it originated from. If anyone has information about this incident I would encourage them to call us in complete confidence.”
Officers detained a 27 year old woman on suspicion of money laundering and she was taken into custody for questioning.
A quantity of cash and stained bank notes were also recovered at the bingo hall on Liverpool Road – around half a mile from Eccles town centre.
If you have any information, please call police on 0161 856 5049, or Crimestoppers, anonymously, on 0800 555 111.