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"application label"

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Payment terminal screen displaying the Application Label of a card

Credit Card

What Is Application Label?

A mandatory alphanumeric field, 1-16 characters, sent in tag 50 of EMV transactions, representing a name related to the card application's AID in the ADF.

EMV Application Preferred Name tag 9F12 illustration

Credit Card

What Is Application Preferred Name?

Application Preferred Name is an optional alphanumeric EMV data element of 1–16 characters, sent in tag 9F12. It is stored on the card and gives the card application a more descriptive name than the Application Label.

Diagram illustrating the EMV Tag-Length-Value (TLV) data structure used in card transactions

Online & Authorization

What are EMV Tags?

In EMV, data is stored in Tag-Length-Value (TLV) format, and it is carried between the card, the POS terminal, and the authorization system in this same format. This post lists every EMV Tag, its type, and its description.

Diagram illustrating the TLV (Tag-Length-Value) data structure

Online & Authorization

What is TLV (Tag-Length-Value)?

TLV is a data storage method used to speed up the parsing of data. For example, reading data from a card's chip at a POS and carrying it through authorization uses the TLV structure.