If you are receiving an error saying "Credit card number mismatch" but have entered a valid credit card number, we apologize! This is a known error that affects about 1 in 100 people and we are working hard to fix it. In the meantime, if you receive this error, please select "Check / Money order" as your Payment Method, confirm that your ship to and bill to addresses are correct (If you entered a ship-to address different from your bill-to, you will need to re-enter the address on your new order), place your order, and a Tallgrass Beef representative will call you for your credit card information. Thank you for your patience.