How do I receive a PIN (Personal Identification Number) for my Mastercard credit card so I can access cash? You will no longer receive a PIN in the mail. You may select your unique PIN by calling the number on the back of the card 844-334-3874 and choosing the correct option. Have more questions? Submit a request 0 Comments Article is closed for comments. Related articles Why is my 3Rivers debit or credit card being declined? How to set the PIN on your Mastercard.