Call ValidateCardDetails service
To validate cards, you need to call ValidateCardDetails, supplying the PAN, CVV, and expiry date. For some cards, such as Switch cards, you also need to supply the issue number and valid from date.
Get validation response
To find out whether the card passed validation, you need to retrieve the validation response.
Are there any errors?
If the card failed validation, card conditions are returned. Therefore to see if there were validation errors, you need to check whether CardCondition contains any information.
Example code snippet
if (response.CardValidationResponse.CardConditions != null)
If there are errors you need to extract the codes and any returned reasons to determine why the card details failed validation.
Not every code has an associated reason.
Example code snippet
foreach (var CardCondition in response.CardValidationResponse.CardCondition)
Console.WriteLine("Card validation failed with code: (0) Severity: (1) Reason: (2)")
CardCondition.Code, CardCondition.Severity, CardCondition.Reason);