Police say Steven Dunn (44), “did not attend a pre-arranged meeting in Forfar” on Thursday, 29 October.
Mr Dunn is from the Stoke-on-Trent area and was last seen at an address there on Thursday, 5 November.
He is white, around 5ft 8 tall, medium build with grey hair and grey facial hair. He speaks with an English accent and when last seen he was carrying a large light blue holdall.
Detective Inspector Gail Hill of Police Scotland, said: "Mr Dunn does not have access to a car and is believed to have used public transport to travel to Stoke-on-Trent.
"We are keen to trace him as soon as possible. Members of the public who may have seen him, or have any information regarding his present whereabouts, should contact police. Members of the public are asked not to approach this man but to simply contact the police.”