If your CD was returned to you damaged en route by USPS, you should contact the requestor (using the button on the en route transaction for the CD) to let him or her know what happened, and also contact us, providing the CD title, to ask us to cancel the transaction. When we do this, the requestor will get the credit and transaction fee back so she or he can try to get the CD from someone else.
This is usually just bad luck, but if you feel that your wrapping method may have contributed to the damage (if your packaging was square in shape instead of rectangular, or there were loose flaps that could have gotten caught in postal sorting machinery, etc.) you should read How to Wrap a CD for Mailing.
If the CD gets to the requestor damaged, he or she needs to mark it received with a problem and choose "Damaged by USPS"). [[529]] discusses this situation.
If the CD comes back to the sender damaged, the transaction needs to be canceled by us.