How to Read a PSA Label (Every Line Explained)
A complete guide to reading a PSA slab label — the grade, cert number, year, set, card number, variety, and qualifiers explained.
A PSA label packs a lot of information into a small space — the grade, the card's identity, and a unique cert number that lets you verify authenticity. Knowing how to read it helps you buy, sell, and authenticate with confidence.
Quick answer
A PSA label shows, top to bottom: the year and set, the card number and player, any variety/parallel, the grade (with descriptor like GEM-MT 10), and a unique certification number used to verify the slab on PSA's website.
What each line means
| Label element | What it tells you |
|---|---|
| Year + brand/set | The card's release (e.g., 2003-04 Topps Chrome) |
| Card number | The card's number within the set (#221) |
| Player name | Who's on the card |
| Variety / parallel | Refractor, SP, auto, etc., if applicable |
| Grade + descriptor | Numeric grade and label (GEM-MT 10, MINT 9) |
| Cert number | Unique serial to verify authenticity |
Grade descriptors
- GEM-MT 10 — Gem Mint, top grade.
- MINT 9 — Mint.
- NM-MT 8 — Near Mint-Mint.
- Lower grades descend through EX, VG, Good, etc.
Qualifiers to know
PSA sometimes adds a qualifier letter for a specific flaw:
- OC — off-center.
- MK — print/ink mark.
- ST — staining.
- MC — miscut.
- PD — print defect.
A qualified grade (e.g., "8 OC") signals one isolated issue and typically trades below a clean grade.
Verifying the cert
Enter the cert number into PSA's official certification lookup. It should return the exact card, set, and grade — a mismatch is a red flag for a fake slab.
How AI pre-grading helps
Understanding labels is easier once you understand sub-grades. Pre-grading your raw cards shows the same centering, corners, edges, and surface evaluations PSA uses.
CardSense AI predicts grades and sub-grades so the label makes sense.
FAQ
What is the cert number on a PSA label? A unique serial that lets you verify the slab's authenticity and grade on PSA's website.
What does "OC" mean on a PSA label? It's a qualifier indicating the card is off-center; qualified grades trade below clean grades.
Related guides
The bottom line
A PSA label tells you the card's identity, grade, and a verifiable cert number. Learn to read each line — and always verify the cert — to buy and sell with confidence.
Last updated: May 28, 2026.
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