You will be asked to set a sub-card PIN when you activate your sub-card.
When you activate your sub-card by calling 1-833-432-6366 and following the prompts, you will be asked to set a PIN for your sub-card.
Keep in mind that only the primary account holder will be able to change or set a sub-card PIN.
Make sure you always remember your PIN and cover it up when you are making a purchase! We don't like card theft either!