Reserved
DE 63
Reserved for private use
- Base format
ans ...999
Provides a private-use container frequently divided into network-specific subfields. Its layout must be resolved against the exact scheme profile and release.
Scheme specifics
Public evidence and current limits
Status describes the evidence we have reviewed. It is not a mandatory, optional, or N/A classification.
| Scheme | Evidence | What the public source supports |
|---|---|---|
| Visa | Official, limited | Visa public authorization guidance references a Field 63 subfield for selected incremental-authorization message reasons.Visa authorization and reversal processing best practices |
| Mastercard | Restricted source | The complete current dual-message definition is located in the Mastercard Customer Interface Specification. |
| American Express | Restricted source | Current authorization layouts and programming notes are participant Network Specifications in the American Express Knowledge Base.American Express Global Network Policy |
Provenance
Sources used on this page
- Wikipedia ISO 8583 field directory, revision 1352601145Secondary base source · CC BY-SA 4.0 · Public transcription of the ISO 8583:1987 field directory and format notation.
- ISO 8583:2023Official context · Current edition metadata; field and value definitions are maintained separately by the ISO 8583 Maintenance Agency.
- PCI SSC account-data classification guidancePCI Security Standards Council · Cardholder-data and sensitive-authentication-data classification context.
- Visa authorization and reversal processing best practicesVisa official · limited scope · Selected estimated, incremental, reversal, and clearing-field guidance.
- American Express Global Network PolicyAmerican Express official · access context · Confirms that current authorization message layouts and programming notes are participant Network Specifications.
The base field row is attributed to Wikipedia under CC BY-SA 4.0. SchemeLens descriptions are independent summaries. Restricted network specifications are named as the missing authoritative layer, not copied or reconstructed.