30

Message format error

The receiving system could not accept the message format.

Outcome: Technical
Code system: UnionPay
Raw format: Two-character alphanumeric DE 39 response code

Operational context

No universal retry instruction encoded

UnionPay wording mapped to the SchemeLens “Format error” 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 UnionPay response code 30
Concept	Relation	Mapping note
Format error	Direct semantic match	UnionPay wording mapped to the SchemeLens “Format error” concept.

Namespace check

The same raw value exists elsewhere

Mastercard 30Format error
Discover 30Format error

Provenance

Sources used for this record

China UnionPay Open Platform: Industry and Content System Interface Specification — Appendix BOfficial, limited-scope source for two-character DE 39 values used by the documented CUPS industry and content interface.
Online specification, updated 24 August 2020; 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.