The only track that may contain alphabetic text.Sometimes both in case one of the tracks is unreadable. Point of Sale card readers usually read track 1, or track 2.It is often that track 3 is not even physically present on the card itself.Track 3 is virtually unused by the major worldwide networks such as Visa.These tracks are known as track 1, track 2 and track 3.
There are 3 tracks on magnetic cards used for financial transactions.
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