Proposing services to a company. Some typical sales letter topics include: Introducing yourself to a lead who's filled out a web form.Offering an existing customer a discount for their loyalty. Provide all required details accurately to avoid delays in processing. For financial advisor use only. The letter is a response to a job advertisement seeking a supervisor position. When you're trying to resolve a problem with a company, the first step should be to discuss your concerns with a representative of the business. For example, you (the business owner) are writing Nina Brown about an unpaid bill from last month. Letter of Intent (LOI) Example for buying or selling a business. Outlines the preliminary deal points for a business sale.