NATS4 Authorize
This biller is available as of version 4.0.73.1
Set up on Authorize.net Website
Register at Authorize.net. Authorize.net will help you set up your account. Please make sure your authorize.net account can work with both SIM (server integration method) and ARB (automated recurring billing).
You must setup the this silent post url in your authorize.net account: http://linkdomain/signup/process_authorizearb.php
Replace linkdomain with your Link Domain.
You also must setup your MD5 Hash value in your authorize.net account. Please ask authorize.net support for help with this.
Set up Authorize in NATS
In the Billers Admin, enter your authorize.net Merchant Login ID, Transaction Key and MD5 Hash Value.
In site admin -> join options for each join option you can enter authorize.net order description and amount of time (in seconds) that authorize.net will use for finding duplicate transactions.