For PSA, CGC, and BGS Pokémon slabs, tamper-evident means the holder should show clues if someone opens or alters it. It does not mean the slab is tamper-proof, counterfeit-proof, or guaranteed authentic by appearance alone. A sealed holder combines three things: a graded card, a label, and a certification record. Buyers should check all three because an intact-looking case or valid certification number can still be copied.
Table of Contents
- What does tamper-evident protect?
- How PSA, CGC, and BGS slabs differ
- Which warning signs deserve attention?
- How to verify a slab before buying
- What should you do with a suspicious or damaged slab?
What does tamper-evident protect?
A grading company seals the evaluated card inside a holder and assigns it a certification number. The holder helps preserve that specific card-and-label combination and makes undetected substitution more difficult. Tamper evidence comes from the case structure, sealed edges, label placement, and other design details.
opening a holder may crack, chip, whiten, distort, or separate parts of the shell. Those clues are evidence, not automatic proof. Factory variation, impact damage, heat, poor storage, and ordinary wear can produce suspicious-looking marks without deliberate tampering.
How PSA, CGC, and BGS slabs differ
psa and CGC generally use rigid shells that hold the card and identification label within a sealed case. BGS holders commonly add an inner card sleeve, so the card may appear less exposed inside the outer shell. That construction difference changes what buyers see.
A sleeved BGS card can move or sit differently from a card held directly by internal rails, while minor movement in any slab does not establish tampering by itself. Each company has also used more than one holder or label design. compare a slab with verified examples from the same grading service and approximate holder generation, not simply the newest case shown online.
Which warning signs deserve attention?
No single mark settles the question. Several related inconsistencies provide stronger evidence than one scuff, chip, or cloudy patch.
check for: Clouding or "frosting" near a seam can result from stress to the plastic, including attempted opening. It can also come from manufacturing or accidental damage, so treat it as a reason for closer inspection rather than a verdict.
- Seams that are uneven, separated, heavily whitened, or coated with residue
- Cracks or chips concentrated around likely opening points
- Case halves that appear misaligned or shaped differently
- A label that is crooked, altered, blurry, or inconsistent with comparable labels
- Card details that do not match the label, including set, card number, language, or variant
How to verify a slab before buying
Start with the grading company's official certification lookup. Confirm that the number returns the same Pokémon, set, card number, grade, qualifiers, and other label details shown in the listing. A matching lookup is necessary but not conclusive.
Counterfeiters can copy a real certification number, so compare any available grader image with the offered card's centering, corner wear, print defects, and surface marks. Before paying: For an expensive card, uncertainty should lower the price or stop the purchase. A seller's reputation helps, but it cannot resolve physical inconsistencies in the card, label, or case.
- Request clear, well-lit photos of the front, back, label, and all four sealed edges
- Ask for angled photos that reveal cracks, clouding, scratches, and surface texture
- Compare the card itself with the certification image when one is available
- Save the listing, messages, payment record, and original photographs
- Use a payment method and marketplace process that provide buyer protection
What should you do with a suspicious or damaged slab?
Do not crack open a questionable slab to investigate unless you are prepared to lose its encapsulated status. Opening it destroys evidence that the grading company, marketplace, insurer, or payment provider may need. Photograph the holder before handling it further, including the certification number and every damaged seam.
Keep packaging if the slab arrived by mail, since crushing or impact can explain case damage. Ask the named grading company about authentication, inspection, or reholder options before submitting anything. Service eligibility and guarantees can depend on the holder's condition and current company rules, so use the company's current instructions for that exact certification. If a newly delivered slab appears altered, document it and open the marketplace or payment dispute before return deadlines expire.
