In order to accept AMEX payments through Caterpay, you will need a separate merchant ID from AMEX. Click here , to visit American Express' UK Merchants website.
The online form and other signup methods can be found here:
Once you receive your American Express MID, please let us know, and we will provide you with the relevant form to set-up the AMEX MID on Caterpay.
Contact details for American Express Merchant Services can be found below.
American Express Merchant Services
Customer Services: 0845 603 1120
(Mon - Fri 8.00am - 6.00pm)