The Affiliate form is one of the built-in forms and is used to control the affiliate registration on the storefront. You can find and edit the affiliate form in Site > Forms section in StoreHippo Admin Panel.
Affiliate Registration Page
Affiliate Form has the following fields by default:
Adding a custom field
You might want to gather more information from an affiliate when they create an account in your store. To do so, you can add extra fields to the affiliate registration form.
To create a new field in the form to collect more information, click on Add field button which allows you to add a custom field.