How can I tell is my Sandbox is CP or CNP?

[pmenefee]

I understand there are two types, and I know that one was chosen when the account was created; but how can I tell which is it after it has been made?

[RaynorC1emen7]

Login to the merchant account, check to see if there a relay response/silent post url settings. CNP have them, CP don't.

http://community.developer.authorize.net/t5/Integration-and-Testing/Hosted-Payment-Form-Relay/m-p/21...