Form W-8BEN-E is a form aimed at foreign businesses that receive payment from an American company. It states that the company providing the services is a foreign entity, and allows foreign companies to claim tax exemptions on U.S.-sourced income.
Foreign businesses are highly incentivized to submit a W-8BEN-E (and to do so accurately): failure to submit, or submitting an inaccurate document both mean that the foreign company must automatically pay the full 30% tax rate.
You can find more information on this and instructions on how to file this form here: https://www.irs.gov/pub/irs-pdf/iw8bene.pdf