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SchemeLens

ISO 8583:1987 response code

26

Duplicate file update record, old record replaced

Standard version
ISO 8583:1987
Paired version code
ISO 8583:1993 · 303

In ISO 8583:1987, response code 26 means “Duplicate file update record, old record replaced”. It is paired here with ISO 8583:1993 response code 303, “Duplicate record, old record replaced”. No reviewed scheme source contains a corresponding entry on this row, so all five scheme columns are shown as N/A.

Merchant handling

Actions to be taken

Treat this as a file-update result, not as a cardholder authorization decision. Correct or repeat the file operation only as allowed by the receiving system.

This is conservative merchant guidance derived from the published response meaning. Current scheme, acquirer, processor, merchant advice, and transaction-specific rules take precedence.

Scheme comparison

Descriptions in the reviewed sources

Each populated value links to its scheme record and preserves the raw code published by that source. N/A means no matching description exists in the reviewed public dataset.

Scheme descriptions compared with ISO 8583:1987 response code 26
SchemeRaw codeSource descriptionEvidence
VisaN/AN/AN/A
MastercardN/AN/AN/A
American ExpressN/AN/AN/A
DiscoverN/AN/AN/A
UnionPayN/AN/AN/A

Standard sources

Version and response-name evidence