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You can find the updated Miva 10 Reference Guide here
First Data is a gateway product, similar to Authorize.Net. In general, to use the First Data Global Gateway you must also have a merchant account with them.
API Endpoint URL: The URL that Miva Merchant uses to submit requests. This field is autopopulated. You should only change it if you are given a new URL by Miva Merchant or First Data.
API Username:, API Password:, API Certificate:, API Private Key:, API Private Key Password: All of these fields are credentials that are created when you set up your account with First Data. They are used to securely identify your store during payment transactions.
CVV2 Message: The text that you enter in this field will appear in your on-line store during checkout when your customer enters their credit card information. Merchants usually use this field to describe the purpose of the CVV2 field.
Transaction Type: Automatic Capture: If you select this option, Authorize and Capture occur when the user clicks the Submit button in the Payments page in your on-line store.
Authorize Only, Capture Later: Authorization occurs when the user clicks the Submit button in the Payments page in your on-line store. To capture funds you must edit the order in Miva Merchant admin and click on the Capture button.
Note that these settings also affect you when you manually create an order. For example:
In the Edit Order screen, you can see that the Capture button is greyed out and the funds were automatically captured after authorization.
Store Entire CC Number: If you select this option the customer's entire credit card number is attached to the order. If you do not select this option, only the last four digits of the customer's credit card number are attached to the order. (You can view the credit card information by editing the order).
Available Payment Methods: The payment methods that you choose here will show up in the payments drop-down list during checkout.
Require CVV2 in Administrative Interface: This option only affects you when you are manually creating an order through the Miva Merchant admin interface. If you enable this option, you must enter a CVV2 number in the Authorize dialog box when you create or edit the order. If you do not enable this option, the Authorize dialog box will still have a CVV2 field, but you can ignore it.