According to the IRS "Instructions for the Requester of Forms W-8" document (Line 8), date of birth is only needed on the W-8BEN form if the withholding agent (the payer) is a US financial institution.
According to the IRS "Instructions for the Requester of Forms W-8" document (Line 8), date of birth is only needed on the W-8BEN form if the withholding agent (the payer) is a US financial institution.