When I worked for the engineering company, I was the one to check all expense accounts before they were submitted for payment. The biggest problem area was meals. They were allowed only a certain amount for their meals. And if they were at a business meal, they had to list names. Even there they were allowed just so much if they picked up the check. No matter what the reason for the meal, they had to attach a receipt. I was forever chasing down the receipts. "Oh, they are in my car. I will get them for you tomorrow." I always tried to get them into the system as fast as possible. And it would irritate me to no end to have one sitting on my desk for more than two days. At the end of day three, I would submit it without the receipts. Then when it became payday, and their paycheck didn't reflect the amount they had submitted, they would start to yell at me for making a mistake. "Did you ever bring me the receipts?" That ended the argument. They made sure they submitted them in time for their next payday. It took a few months for the engineers to get the message, but no receipts, no payment. And you do have a time limit.