Write a letter of complaint to a company that has disappointed you. In your letter state the product OR service for the complaint letter. Read below for information on formatting for our documents. All memos and emails should use proper headings: TO: From: Date: Subject. Emails should not be emailed but submitted as a WORD documents using the emails headings. Letters should have both the sender’s and receiver’s addresses, the date, a greeting, closing, and signature. Subject lines should have first, last, and important words capitalized. The subject line should be specific to the document and only 5-6 words. Refer to your notes for additional information. All 3 documents (Emails, memos, and letters) should follow the 3 paragraph format: Paragraph 1 is a short paragraph that provides the purpose of the document. Paragraph 2 provides the details and if there are many, break the information into 2 paragraphs. Paragraph 3 provides any contact and/or response information. If you use this type of format, you will also be able to organize your information for the document.