Skip to content
SchemeLens

Scheme code system · Discover

Secondary source

1A

Customer authentication required

The transaction requires additional customer authentication or identification.

Outcome
Verification
Code system
Discover
Raw format
Two-character numeric or alphanumeric raw response code

Operational context

No universal retry instruction encoded

Discover wording mapped to the SchemeLens “Additional authentication required” concept.

Use the current scheme, provider, transaction, and advice-code rules; the raw response value alone may be insufficient for a retry decision.

Explicit mapping

SchemeLens concepts

These links are editorial mappings, not replacements for the raw source value. The relation shows how closely the wording aligns.

Normalized concepts mapped to Discover response code 1A
ConceptRelationMapping note
Additional authentication requiredDirect semantic matchDiscover wording mapped to the SchemeLens “Additional authentication required” concept.

Namespace check

The same raw value exists elsewhere

  • Visa 1AAdditional customer authentication required
  • EBANX 1AAdditional cardholder authentication is required

Provenance

Sources used for this record

  • Worldpay: Raw response codesOfficial for Worldpay raw-response behaviour; secondary evidence for the underlying scheme definition.
    Live provider reference, verified 27 July 2026

SchemeLens keeps source wording, normalized concepts, and operational guidance separate so later evidence can be added without rewriting the raw record.