(1) IF you use PC :
Go to https://www.psacard.com/cert/
For example：Input serial number ：＂６５１１７０７０＂
ITEM information will show as below：
(2) IF you use iPhone :
Go to apple store, download PSA’s APP as below：
https://apps.apple.com/tw/app/psa-cert-verification/id996239729
OPEN APP, input serial number ：＂６５１１７０７０＂
Then you will see more detal information about this card.
Source：Bikinimaster.com & psacard.com