1. The Form W-9 is a request for a taxpayer's identification number and certification. It is used by individuals and entities to provide their correct taxpayer identification number to persons making requests.
2. The form requires basic identification information such as name, address, and taxpayer identification number. It also requires the taxpayer to certify that they are a U.S. person and are not subject to backup withholding.
3. Failure to provide a correct taxpayer identification number can result in penalties. Providing false information can also result in civil or criminal penalties.