Accounting New vendors must submit a W9 form to the Accounting Office to verify their federal tax identification number. View / Download PDF PDF Preview: (Viewing PDFs requires browser plugin support and/or Adobe Acrobat Reader) <p>It appears your Web browser is not configured to display PDF files. No worries, just <a href="/sites/default/files/forms/accounting-w9_form.pdf" target="_blank" rel="nofollow noopener">download the file.</a></p>