W-8ECI Form is a
Certificate of Foreign Person's Claim That Income Is Effectively Connected With the Conduct of a Trade or Business In The United States.
It asks for the name of the Individual or Organization that is the Beneficial Owner and country of incorporation or organization.
It is a one page form and worth looking at to understand. It would be relatively simple to fill out if you have your information at hand.
The Instructions will be helpful.
Print out the W-8ECI Form here.
W-8 ECI Instructions.
This is a four page instruction group of sheets.
There are these titles: