If you are processing a PCN and you know that a PCN was incurred outside of the original hire period then submitting the original hire agreement is likely to result in a Notice of Rejection by the issuer. The best approach is to submit the agreement with evidence of the extension such as the signed return document showing the new return date/time or an email from the client agreeing to an extension.
Fleetworks will allow you add a PCN for a date outside of the original hire agreement date range.
In order to satisfy the issuer you should go to the the Documents tab and upload the supporting evidence. When you do this you must select the file type Extension.
When you do this and select Make Representation from the action boxes Fleetworks will submit the hire agreement and the extension evidence and it will adjust the reassignment wording to declare that this was an unofficial extension.