Issuer Action Code — Denial
What it is
Where it appears
Specification reference
Defined in: EMV 4.x Book 3 (Application Specification), Annex A — Data Element Dictionary
Bit-level definitions below follow: EMV Book 3 — Issuer Action Code Denial (5 bytes). Bit positions mirror TVR (tag 95).
Bit & value breakdown
Byte 1Byte 2Byte 3Byte 4Byte 5