title: What is the field name for MID, TID of Authorize.net for knowing it is from NPS
body: <p>What is the field name for MID, TID of Authorize.net for knowing it is from NPS.</p>
  
  <p>NPS will provide unique Merchant ID (MID) and Terminal ID (TID) numbers.  </p>
  
  <p>So while passing fields along with x_Login, x_Amount, x_cust_id adn others 
  I want to pass Merchant ID (MID) and Terminal ID (TID) values, but not sure
  to what field values  it should be passed with.</p>
  
  <p>Couldn't get much information either from these link
  <a href="http://www.authorize.net/content/dam/authorize/documents/CP_guide.pdf" rel="nofollow">http://www.authorize.net/content/dam/authorize/documents/CP_guide.pdf</a>?</p>