Use the Instructions for Form W-8EXP Certificate of Foreign Government or Other Foreign Organization for United States
Tax Withholding and Reporting (Rev. April 2014) when completing the current form. Ignore the instruction for box 8a to check the box for "GIIN."
On Form W8-EXP (Rev. September 2016), for tax withholding and reporting after August 8, 2016, please note that we eliminated the checkboxes for the GIIN and Foreign TIN on lines 8a and 8b as completing the GIIN and/or TIN on the fill-in lines is sufficient.