So our wedding is this Saturday, and I was just reading over our caterer's contract as I'm preparing to write them a check for the final payment. It says in the contract "Compensation does not include gratuity". I had completely forgotten about tipping them! I gather that it should be the typical amount you would tip for food service (15-20%), but should I tip in cash or include it in the check? We are giving them the check for the final payment when they arrive at the venue. If we tip in cash, should we give it with the check? After the reception? I have no idea how this works so any input would be greatly appreciated!