one of the Macy's cards (the red star rewards) has two functions: 1 is used as a normal regular credit card where u can use in places that accept VISA, and the other one is used as a regular Macy's ONLY credit card (the Macy's card that has no VISA logo on, the one my mom has, but you can use that card to pay for all Macy's purchase and they will mail u a bill later, it's like Gap's card). Under the same card, there are two accounts, which their names are
VISDSNB and
MCYDSNB. DSNB stands for Department Stores National Bank, so MCY would belong to the Macy's ONLY credit card account which the account has ony 13 digits, and VIS would be the VISA part of the Macy's card which should contain 16 digits. i got these info by calling Macy's. i hope these help.