title: Which ISO 8583 message type required for PIN Verification?
body: <p>I would like to send a request to a Credit Card System to confirm if PIN is correct for a card.</p>
  
  <p>I have an idea on 
  - How ISO 8583 messages are formatted and bitmap is populated. 
  - How to send an ISO8583 1100 to authorize my transaction request. 
  - How to send an ISO8583 1200 , to do actual transaction.</p>
  
  <p>However I can't find ISO8583 message XXXX which I can use only to just verify PIN.</p>