Shopify/active_merchant — pull request #1299 by Senjai (2014-07-09 23:36:22+00:00)
Title: Add authentication credentials to requests if they're present.

For users who are using Cardinal Commerce to verify credit cards with Verified by Visa and MasterCard Secure there are requirements that the values returned by cardinal are included in the request when authorizing and capturing payments with first data. Without these values present it would behave as a normal unauthenticated transaction.