Give Form W8 BEN to the withholding agent or payer if you are a foreign person and you are the beneficial owner of an amount subject to withholding. Generally, Form W-9 is used to gather information from U.S. persons and businesses.Only USbased companies need to collect Forms W8 or W9. If a company is based outside of the US, there's no need to collect them. If the owner of the disregarded entity is a foreign person, you must complete an appropriate Form W-8. Note. Insert the full name as shown on your income tax return form. Form W9 is a commonly used IRS form for providing necessary information to a person or company that will be making payments to another person or company. Foreign vendors do not complete the Substitute Form W-9; foreign persons or entities must submit one of five available forms. For US taxpayers, they generally are required to submit a form W-9. For nonresident aliens, they are required to file a form W-8BEN.