The Authorize.Net Developer Blog

Posts from Authorize.Net employees, community members and experts about integrating with the Authorize.Net Payment Gateway: sample code, tutorials and problem-solving techniques just to name a few.

This document is an excellent resource for any developer engaged in an e-commerce project involving card payments. 


Merchant-Defined Fields – What are they and how should they be used?

by Administrator Administrator ‎04-14-2011 11:38 AM - edited ‎04-14-2011 02:30 PM (16,298 Views)

When you’re designing a payment form or other application, you may find that you need to submit certain fields for your merchant that aren’t specifically supported or called out in our integration guides. Enter the Merchant-Defined Field (MDF)—an easy solution for this common need.