To reduce the possibility of fraud and error in users recording same/duplicate expenses, on purpose or not. All our customers are looking for a way of preventing doublets to occur. It would be very helpful if some sort of validation is made standard, that when the same user submits an expense report, with a line the same category, on the same date (also interval for e.g. per diems), and with the same amount, and if a project, then also the same project, that a validation happens, and notifies the user.