Broadway, Suite 120. Oakland, CA 94612. The California Department of Business Oversight, Employment, and Labor Division, Division of Wage and Hour, Business Registration, Employer Registration (Form W-8BEN). E-mail address: All Employers who may otherwise be subject to the W-8BEN (a.k.a. “Worker's Comp”) Regulations, must complete and sign form W-8BEN and present the Form W-8BEN to the Employment Standards Division by mail or fax. 2555 E. Broadway, Suite 120. Oakland, CA 94612; telephone: (fax 510); E-mail address: All Employers who may otherwise be subject to the W-8BEN (a.k.a. “Worker's Comp”) Regulations, must complete and sign form W-8BEN and present the Employers' Identification Number (EIN) and pay the applicable W-8BEN fee if that information is not available. E-mail address: If the Employer does not hold an EIN, provide the Payee's EIN number: Payee's identification number should be on your W-8BEN, W-8BEN-PROCEEDING, or W-7 form and is not required to be on your W-8BEN. If the Payee has a Social Security number, include an EIN number (see below) and indicate on your W-8BEN the Payee's EIN. Payment Method and address for all W-8BEN-PROCEEDING and W-8BEN-Paid Forms: If the Employer receives a form by mail from the Employer's EIN address, the EIN should be marked on the envelope, with “W-8BEN” in red lettering. If the Employer does not receive a form by mail from the Payee's EIN, the Payee's EIN number should be on the envelope with the “W-8BEN”-marked address.