The theft of the purse occurred at an equestrian event off Rudding Lane, Harrogate, between 11am and 1.30pm on Sunday 6 February 2022.
It is believed the suspect took the purse from an unoccupied horsebox.
Police enquires have uncovered CCTV footage of the cards being used at cash machines in Wetherby between 1.50pm and 2.15pm the same day, namely at the Halifax Bank in the Market Place and Sainsbury’s on Crossley Street.
If you would prefer to remain anonymous, contact Crimestoppers on 0800 555111.
Please quote reference number 12220021901 when providing details.