![]() (Obviously it never happens in Quick Chip.) If tag 91 is available, you pass it to the chip in the 2 nd Gen AC (along with 8A and 71/72, if available). Issuer Authentication is optional, so Tag 91 is optional. (Has nothing to do with scripts.) The decision of the issuer is in the top bit of Byte 2 (bit ON=Approved Online). (It varies because it allows for discretionary data.) It will contain the decision of the issuer plus flags indicating things to do or not do before completion.
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