Scheme code system · American Express
Secondary source909
System malfunction (cryptographic error)
A system, switch, processing, or cryptographic failure prevented normal completion.
- Outcome
- Technical
- Code system
- American Express
- Raw format
- Two- or three-character raw response code
Operational context
No universal retry instruction encoded
American Express wording mapped to the SchemeLens “System 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.
| Concept | Relation | Mapping note |
|---|---|---|
| System error | Narrower than concept | American Express wording mapped to the SchemeLens “System error” concept. |
Namespace check
The same raw value exists elsewhere
- DECTA Gate 909Decline reason message: system malfunction
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.