He's been caught on surveillance video using counterfeit $100 bills at a gas station in Calverton and at restaurants in Riverhead and Wading River.

Now Suffolk County police are asking the public's help identifying and locating the man.

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The suspect has passed the counterfeit currency four times at four different locations since Oct. 1, police said. Each time he purchased "low-dollar amount" items and received cash back, according to police.

Police are asking anyone with information to call Crime Stoppers at 800-220-TIPS. All calls will remain confidential and callers are eligible to a cash reward of up to $5,000 for information leading to an arrest.