Hi
Have you tried the manual accrual option, It basically gives you an option to reverse the outstanding. For eg- if the agreement accrual is + 100 $, you can use the manual accruals and post it as - 100$ for the rebate conditions (It should be exact negative figure), now if you create the final settlement the system will give you credit memo request with - 100$, now if you totally process this credit memo then the system will reverse accounting entries in the respective GL accounts or if you don't wish to post it to accounts, then just block the credit memo request for further processing. By doing that your rebate agreement status will be remain as D and there will be no accounting postings. I suggest you can try this in Dev first.