I know something similar was brought up with Braintree and Forms here: https://answers.laserfiche.com/questions/131629/Braintree-Pass-First-name-and-Last-Name-to-the-Dropin-UI-#144678

I have a client that has a similar question regarding Authorize.Net and Forms 10.3.1. They are hoping to include additional information from a forms submission into the receipt that comes back to the user from Authorize.Net.

Currently, it only contains the Merchant information and the amount charged. They would like to include information such as line items/invoice numbers/or a description to send along to Authorize.Net. I understand that this is probably not an out of the box feature, does anyone know of anything that could be used for my client? 

They plan on utilizing forms/authorize.net in the future across their departments and being able to add information regarding the transaction for their Finance department is important.