Quality of images. The cover art must not be any of the following: blurry, pixelated, mismatched, cut, misaligned, rotated, incorrect, stretched, mirrored or have any other quality issues. Also, the textual information given must be fairly readable, trying to avoid designs which might difficult its comprehension, like smaller size texts or similar concepts.

Mastering. In order to ensure good audio quality, and meet the standards of today's music industry, all audio files, must have undergone a professional mastering before their distribution.