4aGoodCause can answer most questions about Authorize.net but there may be times when you need to seek support directly from Authorize.net. 

To get help from Authorize.net use the following resources. 

Call Merchant Support

877-447-3938

You may need your payment gateway ID to identify yourself. 

Chat with a Merchant Support Representative

Click Contact Us from the Support Center. Then select Live Chat.  

Search the Support Center Knowledgebase

Support Center

Training Videos

New Merchant Overview