Editing Loyalty program (section)

====Phone number and other methods====
At a physical point of sale, presenting a physical or digital card is not necessary at many U.S. merchants, if the customer enters the phone number associated with the account on a terminal or tells it to a cashier who enters it into the register. When purchasing online, customers usually must log in to the account on the merchant's website. However, when purchasing airline tickets from online travel agencies, customers can usually enter their airline loyalty number into the agency website and the agency will pass it onto the airline.