AP Invoice Holds / Payment Terms Due Dates

 We are looking to find a programatic solution supported by oracle to do either of the following due to a large amount of invoices in a given week / month.

1 - Payment terms due date - is there a way to programatically change the due date of an invoice once it is in the application without having the users update the terms manually through the application? For ex. if an invoice in the application has terms other than immediate assigned to it - can we update the due date / term to be immediate when we are ready to pay literally thousands of invoices all at one time if they belong to a group of identified vendor sites?