Because it seems to be the simplest possible W9 form of all it is a no-worry situation when you fill it out PROPERLY.
I am emphasising the word properly because I want you to know that there are fines for fraud and misinformation.
You are threatened with penalties for any perjury that you might have committed on the W9s. So be careful and re-read the minor amount of info that you have submitted to avoid any claims of you being naughty. Then sign and date the form