Form W-8BEN, a Certificate of Foreign Status of Beneficial Owner for U.S. Tax Withholding, is used by a foreign person to establish both foreign status and beneficial ownership, and to claim income tax treaty benefits with respect to income other than compensation for personal services. We must have this form on file to guide us on the tax withholding for any interest-bearing accounts that you have with us. You can find the fillable W-8BEN formopens PDF file here.