U.S. Bank recently launched the U.S. Bank Smartly card, this card earns up to 4% on all purchases. Some cardholders have received a letter warning them not to use this card for business purchases. Interestingly people are receiving this warning despite not making any business purchases on this card.
If you received this e-mail feel free to discuss what may have triggered it in the comments below.
Hat tip to csryang

