To check a slab’s certification number, enter the number into the grading company’s own verification resource, review the returned record and compare every available detail with clear photographs of the actual card, label and holder. Treat the lookup as an initial check, not proof that the physical slab or seller is genuine.
How to run an official certification check
Start by reading the certification number printed on the slab’s label. Carefully enter that number into the grading company’s own verification resource when one is available, then examine the record returned for that certificate. ISA describes this process as a way to compare its available record with the card presented for sale.
The available lookup routes are not necessarily the same for every grader. A third-party guide to PSA records describes three PSA-specific methods: using PSA’s certification webpage, opening a direct certification-record URL or scanning through the PSA app. These options should not be assumed to exist for other grading companies.
Use the official company record as the starting point even if a seller provides a screenshot or states that the number has already been checked. An independent lookup lets you see the available record directly and reduces the risk of relying only on information selected for a listing.
Compare the record with the slab and photographs
A returned record is useful only when it is compared carefully with the item being offered. Check every field that the record makes available, including:
- Card name
- Set and year
- Card number
- Language or variant, when listed
- Assigned grade
- Grading company
Each detail should agree with both the slab’s label and the enclosed card. Do not stop after confirming that the certification number exists. A valid number could be copied onto a different or counterfeit label, so the relationship between the number, record, label and card matters.
Use clear, current photographs of the actual slab rather than distant images or stock photographs. The images should make the certification number and relevant label details readable and provide enough information to compare the card with the official record. They should also show the holder sufficiently well for its condition to be assessed. If the supplied images do not permit those comparisons, the lookup has not resolved the uncertainty about the item being presented.
Warning signs and limits of a successful lookup
A mismatch between the official record and the slab’s card details or grade requires further investigation and may be a serious warning sign. Recheck the number first, but do not explain away a difference without supporting information. Unclear, distant or stock photographs are also concerning because they can prevent confirmation that the photographed slab is the item associated with the displayed number.
Inspect the holder in the available photographs as well. Visible cracks, separation, deep scratches, cloudiness or other damage remain relevant even when the database returns a matching record. These conditions can affect the ability to evaluate the holder and may indicate that closer physical inspection is needed. Certification lookup should therefore be combined with scrutiny of the card, label, holder and current images.
Most importantly, a database match is not complete authentication of the physical object. Guidance in the supplied sources warns that finding a certification number does not by itself prove that the presented slab is genuine. ISA also states that certificate verification does not identify the current owner, guarantee a seller’s conduct, establish current market value or replace inspection of the physical holder. Keep each of those questions separate from the narrower fact that a corresponding certification record exists.
Conclusion
A certification lookup is a valuable first comparison, but its result must be interpreted alongside the slab itself. A matching database entry cannot establish ownership, seller reliability or the authenticity and condition of the physical holder.
Before proceeding with a graded-card purchase, enter the certification number on the grading company’s own site and match every available record field against clear, current photographs of the actual slab, label, card and holder. Investigate any mismatch, unreadable detail or visible holder concern before deciding whether to proceed.
Disclosures and limitations
- This article was prepared with AI assistance using only the supplied research package. Its evidence includes an official ISA company blog and third-party guides; no first-party PSA, BGS, SGC or CGC documentation was supplied.
- This is an independent educational explanation, not a remote authentication, grade guarantee, market valuation or endorsement of a seller.
Related reading
Sources
- The Number Behind the Slab: How ISA Verification Gives Buyers More Confidence — ISA Grading
- Pokemon Card Certification Number Guide | Verify Slabs — pokesnap.app
- Cert lookup · Gradeornot — Gradeornot
- PSA Cert Lookup: How to Verify Any PSA Slab's Certifi… | PreGradeCards — PreGradeCards