thanks Richard for your quick response. I have been looking at how to do
it. but I didn't find yet. Do you have any documentation to follow? *our
project is in c# and we are using the class AuthorizeNet.CustomerGateway
to call the API methods. Best,
Hi, I am having exactly the same issue but using API. It started
happening from April, 28th. The endpoint used
is:https://apitest.authorize.net/xml/v1/request.api
