By declaring a recipient as expired, RetailLink will attempt to send the message to that account number via fallback to the NedFox EDI center. This will only happen if the branch where the message originates from also has fallback support enabled.
There are also instructional videos available on the RetailLink website (RLEDI1) and on data exchange with suppliers (RVEDI2). You can find them on the Nedfox support site in the Media menu under the EDI series. The codes for these instructional videos are mentioned in parentheses.