Updating a File when Sending Documents to TC

The Challenge: The concept of Receiving and Sending of documents dictates that we generally on write to the files when receiving. When receiving the documents are translated from TC to the files. For sending, we read the files and send a translated version to TC. The customer would like to update something in their files so that they do not need to the flagging of a field in the Header to signify that it has already been sent.