Police officers seized counterfeit notes during the search of a vehicle which they stopped on Otley Road in Harrogate at around 3.25pm on Wednesday 26 February 2014.
All three occupants of the vehicle, two men aged 19 and 35, and a 44-year-old woman, were arrested on suspicion of possession of counterfeit currency.
They have been released on police bail as enquiries into the incident continue.
The bank notes both had the same serial number HH06 173852.
Officers are urging business owners to look out for any notes bearing the same serial number and to get in touch with the police if they come into contact with any.
If you are passed any fake notes or have any information that can help officers with their enquiries into this incident contact North Yorkshire Police on 101 – select option 2 – and ask for Harrogate police.
If you prefer not to give your name, Crimestoppers can be contacted anonymously on 0800 555 111.
Please quote reference number 12140031487 when passing information about this incident.