Eagle-eyed members of the public helped police catch a gang of men fitting scamming devices at cash points around Gloucestershire, a court heard.
Gloucester Crown Court was told a member of the public rang the police after fearing a cash dodgy device had been fitted at an ATM, while another person handed one in to the bank.
Four men are standing trial accused of conspiracy to steal cash by fitting the devices to ATMs in Gloucester and Stow-on-the-Wold between October 2011 and July 2012.
Flavius Novac, 23, of no fixed abode; Costel Procopkiuc, 23, of Whitchurch Gardens in Middlesex; Gheorghe Bechian, 35 of Alma Road in Banbury, and Amraz Hussain, 29, of Cromwell Road, also in Banbury all deny the charge.
A Barclays Bank machine on Bristol Road in Gloucester was targeted at least three times and others in the Co-op in Abbotswood Road, Brockworth and another in High Street in Stow-on-the-Wold.
The cash machines were said to have had a sticky strip inserted into them, which collected the cash.
The trial continues.