This fact sheet does not. Form W-9 (Rev. 9-18-2005) — IRS Form W-9 is used by IRS to verify personal information contained on Form W-8. This information may include a business name, a registered agent, a common or contract street address, and information about a taxpayer's residence or place of business. Also, see Form W-8. Forms W-8 may be issued directly to the IRS, or they may be issued through an on-line service provided by a third party. The IRS may use Forms W-8 to verify your federal tax filings and/or withhold tax from your pay. Form W-8 (Rev. 2-18-2010) (PDF).