The 67-year-old actor was in town for a gig with his blues band at the FM Kirby Center for the Performing Arts in Philadelphia, but dropped his wallet while cycling through the town of Wilkes-Barre to the venue, reported E! online.
A good Samaritan found it and contacted the theatre, and Martin spoke with the man to personally to thank him for returning the item.
After a news channel reported the news via Twitter, Martin replied, "An honest man is found in Wilkes-Barre! Thank you, sir.