If you see this guy around Billerica anytime soon I recommend you don't make change for him.

Billerica Police say he's been into several Market Basket stores in Billerica, where he usually buys something cheap, pays with a $50, and then comes back a little later and claims he was only given change for a $10.

Police are trying to track him down, so if you know who he is give Billerica Police a call at (978) 671-0900.