How to clear payments in Formatted and ready for transmission status without transmitting the file

The users have made several payments in the production instance that have not been transmitted to the bank due to the transmission being disabled. These payments are currently in a "Formatted" status and ready for transmission. We would like to mark them as complete without sending them to the bank, as these are backdated payments that have already been processed by the bank. This will help eliminate the risk of manually transmitting the file to the bank by mistake. Please advise a process to achieve this.