Foreign vendors do not complete the Substitute Form W-9; foreign persons or entities must submit one of five available forms. New line 3b has been added to this form.If a vendor or sponsor is requesting a W-9 from the University, you can obtain a signed W-9 form (PDF) through Financial and Business Services (FBS). This guide tells you what you need to know while filing a claim. We recommend that you read through the guide at the beginning of your claim. To sum up: one of the biggest differences between the W9 and the W8 is that W8 is for nonUS citizens or US citizens based outside of the US. Enter the tax classification (C=C corporation, S-S corporation, P=Partnership) ▻. These FAQs are for Money Market Accounts, High-Yield Savings Accounts, Certificates of Deposits, and mobile banking.