Reply To: Payments, Authorize.net, Multiple Reservations

1. This seems to be new. For the sandbox you now need a different account:
“If you are posting your transaction requests to the gateway URLs https://test.authorize.net/gateway/transact.dll or https://certification.authorize.net/gateway/transact.dll and you are using an account given to you by an Authorize.Net Reseller or from Authorize.Net Sales, you may encounter this error. The gateway URLs mentioned above only work with specific test accounts, available upon request by completing the form at https://developer.authorize.net/testaccount/

I’ll try to improve that in the future.

2. What do you mean with existing? You use the credit card function and it wont get saved?

3. Unless you use a percentage deposit, no. And a different for a special resource isn’t possible either.
Regards