W-9 form

Settings > Advanced

This feature allows you to easily collect your U.S. affiliates' W-9 forms for tax filing purposes. Affiliates will get to confirm if they're U.S. residents first to determine if they must fill in this form.

You will first need to enable it by clicking this button.

You can also set which email address you will receive the signed forms.

Example

This is how a W-9 form is collected from an affiliate.