That may be true with large vendors, but not for the reason you state. As you can see at the following link, the form has only been revised 3 times in the last

That may be true with large vendors, but not for the reason you state. As you can see at the following link, the form has only been revised 3 times in the last 10 years. https://www.irs.gov/prior-year-forms-and-instructions?find=form%20W-9&items_per_page=200 https://www.irs.gov/prior-year-forms-and-instructions?find=f...