Staffordshire Police is appealing for the public to report any sightings of a missing man.
Dariusz Sterniczuk, aged 48, was reported missing to police on April 12 by a friend.
It is believed Dariusz has friends in Stoke-on-Trent and may have once resided in Tunstall.
Officers have carried out a number of checks at addresses across the city but to no avail.
The last contact with Dariusz, who originates from Poland, was on March 21 by telephone, but he has not been seen since August 2013.
Dariusz is described as white, 6ft 1in tall with a stocky build and short, cropped, greying hair.
Anyone with information on Dariusz is asked to contact Staffordshire Police on 101 quoting incident number 363 of April 12.