Metal dealers in Scotland can no longer pay in cash in Scotland after a ban on the practice came into force on 1 September.
Since December 2012, a cash ban has been in place in England, which has meant that traders near the border have been able to bypass the law in England by heading into Scotland.
The ban was accompanied by a week of action involving British Transport Police, Police Scotland and Trading Standards.
British Metal Recycling Association chief executive Robert Fell said: “As the trade body for many scrap yards in Scotland, the British Metals Recycling Association welcomes the cash ban and the enhanced identification requirements. We stand ready to support our colleagues in local authorities, British Transport Police and Police Scotland as they enforce the act from 1 September onwards.”