Can I add a “note” field on the payment form ? Perhaps 40 characters ?

[Byterbit]

Can I add a “note” field on the payment form ? Perhaps 40 characters ?  It’s a make or break for  my client. As a developer testing without a merchant account I see from the docs here http://www.authorize.net/support/merchant/Integration_Settings/Form_Settings.htm  that I can add fields, but I cant be sure of a note field working !  It’s so my clients customers can note which invoices they are applying a payment to( long story); as such it must stay with the payment such that my client can see them days later.

[RaynorC1emen7]

You can't add a new fields that is not in authorize.net, you can send it, but it not going to saved in authorize.net

There are the description, Purchase Order Number or Invoice Number field that you can use.