The present invention provides for automation of the process of ensuring that the contents of the return mailed digital media, comprising a disc enclosed in a sleeve, is correct for redistribution. A camera on a sorting machine is used to scan a first code on a hub of the disc through a sleeve opening. The camera also scans a second code printed on the sleeve. The sorter computer compares the first and second codes to determine whether the first and second codes correspond. If the first and second codes do not correspond, the sorter outsorts the mailed digital media so that the mismatch problem can be corrected. In a further embodiment, the system detects whether there are more or less than a single disk in the mail package. In the preferred embodiment, the mailed digital media is further composed of an envelope that receives and encloses the sleeve. The sorter scanner scans first code is further comprised of scanning the first code through an envelope opening, preferably the same envelope opening used for scanning of the first code.