Sales letters require certain elements that help convince a customer to invest in a product or service. Problem: Don't know how to send a follow up message after a meeting?Kevin Clark offers a helping hand in this video sales letter example. A sales letter is the dojo of the marketing world. It's where you find out exactly how clear you are or not. Time for some marketing "blasphemy": You don't need a "killer" sales letter. Or, even a good one. A sales letter is an important tool for shaping the way customers think of you. Create an Sales Clerk cover letter that lands you the interview with our free examples and writing tips. Create an Sales Clerk cover letter that lands you the interview with our free examples and writing tips.