But if you just send a partial payment, they will probably continue to add on fees as it is not for the total amount borrowed. Also, I would send another complaint to the BBB, stating that you had made that payment in good faith, it was never cashed, and now you have resent that payment as a paiyment in full. Also, do you have anything in writing as to their acceptance of the $300 as a PIF? If so, I would attach that as well and any other receipts you may have from the original $300 money order, AND bring it up to their attention Like I said, saying that haven't received something, or not cashing it, is their way of adding on more fees. Don't let them get away with it. Give them their $300, walk away, and don't look back.