Police are warning the public to be on the alert after an incident on Monday afternoon.
At about 4 pm a man called at the home of a lady in the High Street asking to get entry to check both her gas and electricity meters.
She let him in but was suspicious as her meters had only recently been checked. The lady accompanied the man throughout his visit, and he noted numbers from the meters on a clipboard.
However, further checks with the utility companies revealed that they had no-one in the area checking meters.
The suspect is described as being white, about five foot six tall, in his early 50s, slim build with thinning mousey brown hair and a weathered face. He was wearing dark trousers and a blue polo shirt with a high visibility vest and had some kind of lanyard around his neck.
Constable Emma-Jayne Neylon at Langholm said: “It always pays to check the identity of anyone who wants access to you home. Genuine callers never get offended when asked for identification.
“On this occasion it seems that this man was never left alone while in the house and perhaps his intentions were foiled. We urge all householders to be extra careful in whom they allow access to.”
Anyone who can help identify this man, or who may have had a similar experience, should call officers on 101.