Card (ICC)Format: nLength: 6Kernel-specific
9F5D

Available Offline Spending Amount (AOSA)

Tag ID
9F5D
Format
n
Length (bytes)
6
Source
Card (ICC)

What it is

Available Offline Spending Amount (AOSA) is the remaining amount the cardholder may spend offline, computed by the card from its offline accumulator and limits. Contactless kernels can return it so the reader (or a companion app) can display "available to spend offline" to the cardholder.

Where it appears

Returned by the card during contactless processing.

Specification reference

Defined in: EMVCo Contactless Book C-2 (Kernel 2 / Mastercard); also Book C-3

Meaning by contactless kernel

Kernel 2· Mastercard

Returned in the GPOGet Processing OptionsThe EMV command that starts a transaction; the card responds with the AIP and the records to read.View in glossary →/records and may be shown to the cardholder as offline balance.

Kernel 3· Visa

Supported where offline data storage / balance display is enabled.