A grading case is only evidence if the case is genuine and unopened. Five checks — certificate lookup, label, seams, weight and the card itself — catch nearly every fake slab.
Key takeaways
- Always look up the certification number on the grading company's own site before paying.
- Compare the card in the case to the images the grader holds for that certificate, where available.
- Check the seams all the way round for glue, gaps, melted plastic or mismatched halves.
- Look at the label: font, spacing, print quality, holograms and how squarely it sits.
- If the certificate does not exist, does not match, or the seller will not give you the number, stop.
Slabs raise prices, which makes them a target. There are two separate problems: an entirely counterfeit case with a fake label, and a genuine case that has been opened and had the card swapped for a worse or fake one. The checks overlap but the tells differ.
One: the certificate
Every major grader publishes a lookup where a certification number returns the card, the set, the grade and often photographs. PSA and CGC both provide this. A number that returns nothing, or returns a different card or grade, ends the transaction. So does a seller who will not share the number before payment — there is no legitimate reason to withhold it.
Two: the label
- Compare font weight, letter spacing and line positions against a known genuine slab of the same era.
- Check spelling of the set and card name; fakes get punctuation and accents wrong.
- Look for the security features the grader uses and how crisp they are.
- A label sitting slightly crooked, or with visible ink dots under magnification, is a warning.
Three: the case itself
- Run a fingernail around every seam feeling for a ridge, glue or a step where the halves do not meet.
- Look for cloudiness, melt marks or tool marks near the corners.
- Hold it to a light and check the inner well holds the card snugly, with no movement or added spacer.
- Compare the thickness and weight against another slab from the same grader if you have one.
Four: the card inside
Grade the card through the case as you would raw: centering, corners, edges you can see, and surface under angled light. A card that clearly does not match the grade on the label is a serious red flag, whether that is because the slab is fake or because it has been reholdered dishonestly.
Five: the seller and the price
- A high grade priced well under recent sold results is the oldest bait in the hobby.
- Check the seller's history for graded cards specifically.
- Pay on-platform with protection so a fake can be reversed.
- For very high value, buy in person where possible, or through an auction house that authenticates.
Common questions
- How do I verify a PSA or CGC certification number?
- Enter the number from the label into the grader's own certificate lookup page. It should return the same card, set and grade as the slab, and often photographs you can compare against the item in front of you.
- Can a graded card case be opened and resealed?
- Yes, and that is exactly why the seams matter. Feel for ridges, glue, gaps and tool marks all the way round, and check the card sits snugly with no added spacer.
- Are fake slabs common?
- They are uncommon compared with fake raw cards, but they concentrate at high values because that is where the money is. Treat every four-figure slab as needing verification, not just a glance.
- Is a cheap high-grade slab ever legitimate?
- Occasionally, from a seller who has not researched the market — but far more often it is a fake, a swapped case, or a non-delivery scam. Verify the certificate and pay with protection before you get excited.
A video version of this guide is planned for the DeuxyDex channel.
Sources
- [1] PSA: certification verification
- [2] CGC Cards: certification lookup
- [3] PSA: card grading standards
- [4] Pokémon Support: did I purchase fake or counterfeit cards?
Prices, pull rates and set details change. Where we could not verify a claim, we left it out.