Authentication & Grading

How to Research Certification Numbers and Reference Data

11 May 2026 2 views Grading Authentication Safety

Use third-party verification sources when they exist

For some collectibles, a third-party grader or certifier may expose a lookup page or reference system. For example, PSA certificate lookup is one external reference source for relevant items.

Research checklist

  • Match the certificate or serial number to the listing photos
  • Compare holder details, labels, and visible identifiers
  • Check whether the collectible category commonly uses reference numbers, provenance, or catalog identifiers
  • Use multiple data points, not one screenshot or claim
Warning: External databases can help research an item, but they do not replace your own judgment, marketplace policies, or support review.
eBuy does not own or operate third-party certification registries and cannot guarantee the completeness or accuracy of external lookup systems.
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