Debit Card PIN or Personal Identification Number is a 4-digit code unique to each Solid issued Debit card. It ensures that it is the cardholder making the transaction. The Debit Card PIN could be required at an ATM or at certain Point of Sale (POS) devices that need the Debit Card PIN to be entered to complete the transaction.
By default, the PIN of each card is the last 4 digits of the card number. A new PIN can be set by calling the Set a New PIN API.
For more detailed information, please see Debit PIN Transactions.