If you refund the buyer's original payment item from your Google Checkout account, Google should notify our system of that, so we would adjust your logs and commission totals accordingly. After you refund the payment, you can verify this has happened by looking for the original transaction in your E-junkie Transaction Log; refunded orders are shaded in pink. When you obtain your masspay file next month to pay out commissions earned in February, we generate that file from the state of your logs at that moment for February's sales, accounting for any refunds in that month as well.