Authenticity checks can vary depending on the system and the game.

For cartridge-based games, we may look at details such as the label, cartridge shell, screws, board, chips, print quality, plastic colour, weight, and other signs that help identify original games versus reproductions or counterfeits.

For disc-based games, we may check disc printing, inner ring markings, case details, artwork, and other indicators.

Some games are checked more closely than others based on value, rarity, and how commonly that title is counterfeited.