Police are investigating a robbery that took place in Tesco, Mereway, Northampton, on Tuesday, 16 June.
A man approached a checkout assistant and asked her to change a £20 note. The man was aggressive to the assistant who changed the note.
The offender continued to be aggressive to the woman, telling her to continue handing over cash, which she did.
The man then made off from the shop with the cash.
He was a white man, of average hight, athletic build and had dark brown hair, a tanned complexion and was in his mid to late 20s. He wore dark coloured slim fitted trousers and a light purple shirt with the sleeves rolled up.
Officers would like to speak to anyone who may recognise the description of the man, pictured, or who may have any information regarding this incident.
Witnesses or anyone with information is asked to contact police on 101 or Crimestoppers anonymously on 0800 111 222.