What information goes across the network to a processor when a credit card transaction goes through? One of these pieces of information is the POS Entry Mode–data which relays to the processor exactly how the transaction went through. Here’s a short list of the different possible codes:

POS Entry Mode

• 01 – Manually keyed (this will pertain to Visa internet transactions as well)
• 02 – Magnetic stripe read (general or track 2)
• 05 and 95 – Contactless chip card
• 06 – Magnetic stripe read (Track 1)
• 07 – Contactless chip card using Visa Smart Debit / Credit chip data rules
• 81 – Manually keyed e-commerce (Mastercard only)
• 90 – Entire magnetic stripe read and transmitted
• 91 – Contactless chip transaction originated using magnetic stripe data rules (visa only)

For more information on Track 1 and Track 2 credit card swipes, check out Wikipedia: credit card magnetic stripes.