Bill Back deals invoice timing

Hi all,

Does anyone know if it is possible to set up a promotional billback rebate deal in RMS13.2 that will only invoice once at deal end date (end of week if possible but end of month which the deal ends in will suffice) even though it might span across several weeks or months?

The only way I could maybe think this would work would be to set the bill back period to yearly and hopefully the month the deal ends in will result in an invoice at the end of that month.

This needs to be automatica as well, no manual intervention