# Require W-9 form submission
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Following the U.S. tax law and IRS regulations, merchants must collect W-9 forms from all affiliates who are US citizens. It is a way for the government to ensure taxes are paid. Learn more about the W-9 form here: [**https://www.irs.gov/forms-pubs/about-form-w-9**](https://www.irs.gov/forms-pubs/about-form-w-9)
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To require your affiliates to fill out and send you the **W-9 form**, please enable the function by going to **Settings** > **Payment** > **Tax documents**, then enable **Require W-9 form submission**.
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**Tip**: To ask your affiliates to submit W-9 form when signing up, you can add **W-9 form** field while customizing registration page. Please make sure to mark this field as required.
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The option to enter tax information will appear in each of the affiliates' accounts (**Affiliate admin** > **Settings** > **Tax information**).
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**Note**: It is required to provide the affiliate's signature and date on the W-9 form. To sign the form, open the PDF file on a PDF reader software (such as Foxit Reader, Adobe Reader, etc.) and find the **PDF sign** tool.
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Once an affiliate has submitted the W-9 form, you'll receive an email notification that contains their W-9 form. You can also see it from the *merchant's side* by going to **Affiliates** > click on an affiliate name > **View the W-9 form**.
You can also view the affiliates’ W-9 form submission status, please enable the W-9 form column via Custom columns on the Affiliates and Payments page.
