What this check does
The card check validates the Luhn checksum and enriches with BIN data where known.
What is a Luhn card check?
A Luhn check validates the mathematical structure of a card number. It catches many entry errors but does not authorise a payment.
What the result means
A valid Luhn result means the number is structurally plausible.
What the result does not prove
It does not prove the card is active, funded, authorised or owned by the user.
When businesses should use it
- Form validation
- Payment support diagnostics
- Fraud triage
Example workflow
- Run Luhn validation.
- Review BIN metadata.
- Use your payment processor for authorisation.
Data sources
Luhn checksum logic and BIN metadata.
Limitations
Never treat format validation as payment approval.