Deal: Amex and Knott launch card-on-file solution

American Express and card-on-file management company Knot are launching a card-on-file payment solution to improve the payment experience at trusted retailers. “Amex has integrated with Knot’s CardSwitcher technology, which allows eligible cardmembers to quickly and securely provide their payment information to participating merchants through the Amex website,” said Stephanie Schultz, vice president and head of American Express (…)