Developed by the American Bankers Association. It is strictly numeric and designed for automated credit card processing. It contains the Primary Account Number (PAN), expiration date, and Service Code, but not the cardholder’s name.
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Conversely, ATMs and gas station pumps often store only Track 2 data. If a criminal collects a "dump" (Track 2) from a skimmer at a gas pump, they cannot immediately use it for most online "card not present" (CNP) fraud. They need to convert the Track 2 string into a valid Track 1 string. Developed by the American Bankers Association
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: When printing or encoding new cards, these formats ensure the hardware can read the data correctly.
: Systems that require Track 1 for verification but only receive Track 2 swipes may use conversion logic to bridge the gap.
Track 2 is numeric-only. When a system expects a full Track 1 signature but only receives Track 2 data, the transaction or test case may fail.