GOA

GOA is the official mobile authentication tool from Grading Owl Authentication, designed to verify the authenticity of GOA-graded collectible cards quickly and securely. The app lets collectors and dealers validate a card’s grading by reading an embedded NFC chip or by entering a certification number manually, delivering instant access to grading details. Users who handle traded or valuable cards will appreciate the simplicity of tapping a phone to confirm provenance and grade, plus a built-in Activity log that stores recent checks so you can revisit past verifications and maintain an audit trail of inspections.

Key Features

⭐ Verify GOA-graded cards by tapping to read the embedded NFC authenticator.

⭐ Option to enter a certification number manually to pull up grading records.

⭐ NFC chip stores an unclonable cryptographic authenticator linked to the card’s grading.

⭐ Instant access to grading details and provenance after a successful read or lookup.

⭐ Activity history keeps a searchable log of past verifications for easy review.

Advantages

✅ Fast, on-the-spot verification that reduces uncertainty when trading or buying cards.

✅ Uses cryptographic authentication to make GOA checks resistant to cloning or tampering.

✅ Manual lookup provides a reliable fallback when NFC reading isn’t available.

✅ Activity log helps collectors and sellers maintain a record of inspections and checks.

Disadvantages

❎ Tap-based verification requires an NFC-capable phone to read the embedded chip.

❎ The app only confirms cards graded and authenticated by GOA; it won’t validate non-GOA grading services.