Please attach copies of any documents, receipts, warranties, invoices, correspondence, photos, etc. That will help substantiate your complaint, sign below,.California Employee Complaint Form. Utilize the Employee Complaint Form to officially submit a complaint to the HR department. Download, fill out, and mail this form to P.O Box 944255, Sacramento 94244. By FAX: Download, fill out, and fax this form: (916) 323-5341. Edit, sign, and share california complaint form online. No need to install software, just go to DocHub, and sign up instantly and for free. A link to the Consumer Complaint Form is listed below. Ensure that all provided data is accurate and complete.