How am I sure you're not mixing mine card/s together with someone else's if we ship the same card/s?

It is noted EXACTLY which order we send card/s in. We always know that card/s No. 1 belongs to customer x and card/s number 100 belongs to customer y. The second PSA receives ours card/s, everyone will be card/s assigned a certificate number that you find on your license plate. This number is a "unique identifier" where there is only one of each. No matter how many of the same card/s sent in, we know exactly where in our order your card/s is located. With the certificate number, it is easy to find which one card/s there's yours, and which one card/s there is someone else's. On this point, PSA are incredibly professional and even have a very strict and fixed process to process ours card/s so they don't mix together.