Three boys entered McDonalds fast-food restaurant in Phillip late morning on July 30 and one of them is alleged to have stolen an EFTPOS terminal from an ordering kiosk.

Police describe him as wearing black pants, black jacket and a green and beige cap.

As the trio are believed to be under 18, police have blurred their faces due to legislation that prevents the identification of young people and a criminal incident.

Police are wanting anyone with information about the theft or can identify the boys to call 1800 333000, or via the Crime Stoppers ACT website.