Please attach copies of any documents, receipts, warranties, invoices, correspondence, photos, etc. That will help substantiate your complaint, sign below,.Fill the form out completely. Fill out the last page (Narrative) as best as you can, this will help us when reviewing the form. Here's a sample to help you write a complaint letter about a product or service. Citizens can submit a Consumer Fraud Complaint Form for the unit to review. Visit the Consumer​ Protection webpage for more information. ​. FREE complaint form templates that you can edit and use online, including your website. ✓No coding is required. Consumer Action offers a sample complaint letter and an email complaint template.