Please refer to the following links of W-8BEN forms for Individuals and Entities. Both of which are currently being accepted until further notice.
W-8BEN Form - https://www.irs.gov/pub/irs-pdf/fw8ben.pdf
W-8BEN-E Form - http://www.irs.gov/pub/irs-pdf/fw8bene.pdf
More info on W8BEN please refer to this page.
If you would like to send the filled form to us, please go to write to us from Platform Contact us>Write to us>Personal information and documents>Submit documents