How am I sure you don't mix my card with someone else's if we send the same card?
It is carefully noted which order we send briefly. We always know that card # 1 belongs to customer x and card number 100 belongs to customer y. The second that PSA receives our card, all cards are assigned a certificate number found on one's slab. This number is a "unique identifier" where there is only one of each. No matter how many of the same cards have been sent in, we know exactly where in our order your card is located. With the certificate number it is easy to find of which card is yours and which card is someone else's. At this point, PSA is incredibly professional and even has a very tough and firm process to treat our cards so that they are not mixed together.