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SchemeLens

ISO 8583:1993 response code

306

Not successful

Standard version
ISO 8583:1993
Paired version code
ISO 8583:1987 · 29

In ISO 8583:1993, response code 306 means “Not successful”. It is paired here with ISO 8583:1987 response code 29, “File update not successful, contact acquirer”. 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-action result, not as a cardholder authorization decision. Continue, correct, or stop the file operation according to the response name and the receiving system’s specification.

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 8583:1993 response code 306
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