Sales letters require certain elements that help convince a customer to invest in a product or service. In this article, we provide a stepbystep guide to help you write an effective letter to sell a product with a template, sample and tips.The 12-step sales letter template is designed to overcome each of these objections in a careful, methodical series of copywriting tactics. Have you ever tried (or been tasked with) writing a sales letter? For each example, I'm going to deconstruct exactly what made it so effective, then tell you how to apply it in your funnel. Find homes for sale. Meet network agents who can help you buy or sell with confidence.