If someone you don’t know sends you a check and asks for money back, that’s a scam. Fake checks drive many types of scams — like those involving phony job and income opportunities, online classified ad sales, and others. In a fake check scam, a person you don’t know asks you to deposit a check – sometimes for several thousand dollars and usually for more than you are owed — and send some of the money back, often by wire transfers or gift cards...