<prompt> Human: Its happend to me a few times with both my Chase Sapphire Reserve and Amex Platinum. The waiter or cashier says we cannot take that card but take another visaAmex card. They also typically have a sign that says we accept Visa Amex etc.  <response>: Im pretty sure Amex or Visa merchant agreements would prevent merchants from accepting only some of their cards. They either have to take them all or cant take any. Id report them to AmexVisa. 