You are in charge of the checking account for a small business. One morning, your accounting supervisor enters your office and asks you for a check for $150 for expenses that he tells you he incurred entertaining a client last night. He submits receipts from a restaurant and lounge. Later, your supervisor's girlfriend stops by to pick him up for lunch, and you overhear her telling the receptionist what a great time she had at dinner and dancing with your supervisor the night before. What would are the steps to take and why?