A grade is only as good as your ability to check it. Here’s how to verify a CALIBRE-graded card — whether you’re buying one or you’ve just had your own graded.
Every card gets a unique certificate
When CALIBRE grades a card, it’s sealed in a tamper-evident slab carrying a unique certificate number. That number ties the physical card to its grade and its full measurement report.
How to verify it
- Look up the certificate. Each graded card has a public report page showing its grade, the card details, and the measurements behind it — reachable from the certificate on the slab.
- Browse the registry. The public registry lists the cards we’ve graded. A genuine certificate is verifiable; one you can’t find is a red flag.
- Check the slab. The slab is tamper-evident — signs of it having been opened or resealed mean the grade can no longer be trusted.
Why this matters when buying
Anyone can photograph a slab. Verifying the certificate confirms the grade is real and matches the card in front of you — protection against tampered slabs and faked labels.
For your own cards
Once your card is graded, its certificate and report are yours to share — a permanent, verifiable record of condition you can show any buyer. See how grading works.