A secure CGC Pokémon slab should have an intact ultrasonic weld, a consistent security label, and a live certification record matching the card and holder images. A slab—a graded card sealed in a hard plastic holder—should never be trusted on its certification number alone. Each check covers a different risk. The weld may reveal holder interference, the label adds anti-counterfeiting layers, and the database confirms what CGC associates with that number.
Table of Contents
- What the weld can—and cannot—show
- Which label features matter?
- How to verify the certification
- How holder condition affects protection
- When a valid-looking slab still deserves a pause
What the weld can—and cannot—show
CGC describes its standard card holder as an ultrasonically welded case designed to resist impacts and tampering. The holder covers trading card games, including Pokémon, but resistance does not make a slab impossible to damage or manipulate. Inspect the entire perimeter under good light.
Look for an opening, a separated seam, major cracking, or other damage suggesting the holder is no longer sealed. A tidy seam is only the first check. It cannot establish that the label belongs with the enclosed card or that the certification remains active. CGC's own holder description combines the weld with several label protections rather than presenting either as a standalone test on its holder and label page.
Which label features matter?
cgc identifies microprinting, UV ink, holographic foil, a unique certification number, and a barcode as anti-counterfeiting features. These are security layers, not independent proof that the card inside matches the certification. Compare the label's printed details with the Pokémon card itself.
Check the card name, set or issue information, grade, and certification number wherever those details appear in the online record. If you cannot inspect the UV ink or microprinting, treat those features as unconfirmed. Likewise, the presence of a convincing hologram or barcode should not override a mismatched card, grade, number, or verification image.
How to verify the certification
Use CGC's certification lookup before buying, not after a problem appears. CGC instructs collectors to enter the certification number or scan the label's QR code, then compare the description, grade, and available holdered-card images with the slab through its certification lookup.
Follow the checks in this order: A database result proves that CGC recognizes the number. The matching details and images help determine whether the slab in front of you corresponds to that record.
- Enter the number manually or scan the QR code.
- Confirm that CGC returns a live record.
- Match the Pokémon card's identity and grade to that record.
- Compare the physical card and label with the available slab images.
- Pause if the record contains a warning or any material detail differs.
How holder condition affects protection
CGC's guarantee covers card authenticity unless the label states otherwise and also protects against overgrading. However, CGC excludes cards in holders that are damaged, unsealed, tampered with, altered, counterfeit, or removed from their holders under its current guarantee terms. The guarantee also limits claims to ten years from grading.
The certification number must have been active, without a published warning, when the current owner bought the card. That makes a pre-purchase lookup part of risk control, not just identification. A dated screenshot can preserve what you reviewed, although it does not establish guarantee eligibility by itself.
When a valid-looking slab still deserves a pause
Certification systems can face card-specific authenticity questions. On January 31, 2025, CGC reported an investigation involving certain Pokémon Prototype and Playtest cards, representing under 0.03% of all cards it had graded in its updated notice.
CGC advised collectors to halt transactions involving the listed certification numbers while the matter remained under investigation. If a certification appears on a CGC warning notice, stop the transaction until CGC publishes a resolution.
