Your lot number is printed on the vial label, and the QR code on the label opens this page with it filled in. Certificates are matched to lots exactly, so check each character.
Lot Lookup
Check your lot
Every lot is third-party tested. Its certificate is published here as soon as the lot is released.
Lot Lookup
Check your lot
Type the lot number printed on your vial label to open that lot's certificate. A lot without a published certificate shows "COA pending".