9F41

Transaction Sequence Counter

Counter incremented by the terminal per transaction; helps correlate logs and detect gaps.

Properties

Tag9F41
NameTransaction Sequence Counter
FormatNumeric (BCD)
Length2–4 bytes
SourceTerminal
Templates—
BooksBook 3

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Frequently asked questions

What is EMV tag 9F41?
Counter incremented by the terminal per transaction; helps correlate logs and detect gaps.
What format and length does EMV tag 9F41 use?
Tag 9F41 uses the Numeric (BCD) format and is normally 2–4 bytes long.
Is tag 9F41 provided by the card or the terminal?
Tag 9F41 (Transaction Sequence Counter) is provided by the Terminal.

Sources

  • EMV 4.4 Book 3, Annex A (Data Elements Dictionary) (page pending verification)
AID Parameter Table parserPublic Key Table parser
All EMV tags

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