Is there a document I can refer on the details on what can be updated or not on an AP invoices?

Hi,

Is there any documentation I can refer to that states the details I can add or update on an AP invoice that has been validated , accounted or applied on an open or closed period?

With this, we would like to know how can we possibly restrict the end-user to make an update on transactions that were validated and accounted in previous months whose period is already CLOSED.

Thank you very much for the help.