Original Anonymous here with somewhat modified and expanded information.
Former customer came into drive-through with a 5-figure check from insurance company, but check was entirely in former customer's handwriting. Check was made payable to former customer's parent, and former customer does have POA for this parent. Customer refused to endorse check as POA. Branch refused to accept check for deposit, split deposit or cash. Former customer went to a 2nd branch drive-through and 2nd branch responded similarly. Former customer became verbally abusive, left 2nd branch drive-through and left suspicious check behind at the branch. So - attempted fraud.