Payment refunds and reversals do affect affiliate commission earnings, as long as you have not already generated the masspay.txt file to pay out commissions for the month when the original sale occurred.
When you go to Seller Admin > Pay Your Affiliates to obtain your monthly commission report, that generates a fresh masspay.txt file based on the current state of your Transaction Log at that moment for sales in the last completed calendar month. If anything affects that month's sales after you generate the masspay.txt file, those changes will not be carried over into the next month's commission calculations. For instance, payments from the completed month may get refunded or reversed, or if you had a payment funded by eCheck late in the month, it could take several days into the next month for that check to clear.
For this reason, we recommend generating your masspay.txt file in the last half of each month, which should allow plenty of time for eChecks to clear or any refunds or reversals to be processed.
