We had an issue where a sub had submitted an invoice early in the month and later in the month submitted an additional billing. We only accept one invoice per month per sub. Support suggested putting in an enhancement request to allow the option to switch off the ability to submit more than one invoice per month. I think that would be a very good idea.
Thanks for the great suggestion! We often get this request. One workaround is to hold off on your approvals until the end of the billing period because subs are only able to submit one Pay App into the system at a time.