What audit rule have you written that you have found most helpful or you wish you would have had at implementation?

This question comes from our LinkedIn group.

One of the top audit rules is how you prevent (or don't prevent) submission of an expense report based on violations. While a “hard stop” submission process will not allow the user to submit an expense report that is out of policy or not complete, a “soft stop” approach can be seen as more user-friendly. For example, you can block (hard stop) an expense report from not being submitted if it includes an un-itemized hotel bill. However, a “soft stop” would allow a user to submit an expense report even if it didn’t include receipts for expenses under $25, and instead might alert the manager or target them for audit.