My friend just got hired for a "job" that was an overpayment scam last week. She was hired, given some work to do, and paid an advance. They then said a custo

My friend just got hired for a "job" that was an overpayment scam last week. She was hired, given some work to do, and paid an advance. They then said a customer needed a refund, and they wanted her to wire her advance to Nigeria. The problem is...now she has a cheque, assumes its some sort of scam, but what if it clears? Was someone else scammed and she is the middleman? Is it legit?