title: Validating Credit Card Information - CVV Numbers
body: <p>I am using authorize.net {aim} for my payment gateway. I am using test authorize for developer account.</p>
  
  <p>I have used <a href="https://test.authorize.net/gateway/transact.dll" rel="nofollow">https://test.authorize.net/gateway/transact.dll</a> with C# and it successfuly works without error.</p>
  
  <p>But my client needs to validate the cvv [Card Verification Value]. How can this be done?</p>