Email Customization
Before you automate the W-9/W-8 collection using the RequestByEmail method, you can customize the email sent to your payees (recipients) with your own branding.
Customizable elements
- Logo- Set the logo and favicon as per your preferences
- Color Theme- Customize the primary color of the email theme.
- ‘From’ Email Address- Personalize the ‘From’ email address on the emails
- Sender Name- Customize the name of the sender as you prefer
- Support Contact Information- Provide the contact details your clients can use to
contact you.
How to customize
You can customize the email in two different ways:
1. Generate CustomizationId in developer console - You can customize the email in your developer console and generate a CustomizationId. Include this ID in your API requests for the RequestByEmail method. Here is how:
- Log in to the developer console. Navigate to Customization —> Email Customization.

- Complete the customization workflow to configure your sender name, ‘From’ email address, and other visual elements. You can choose between two options
- Basic - Set up a branded email address under our domain (Example: noreply@yourbrandname.biztaxconnect.com)
- Advanced - Customize the entire ‘From’ email address, including the domain.

- You’ll get a EmailCustomizationId. Pass this ID in your W-9/W-8 API requests to implement the changes.

2. Include customization details in the API Request - Alternatively, you can pass a Customization object directly in the API request for the corresponding request method to apply your preferred settings.
These customizations apply only to the email. To ensure consistent branding on the form completion page (secure URL), you’ll need to customize it separately.
See how