In this article, we discuss how to write a business proposal letter and we offer sample letters and templates you can use as a guide. Do not email proposals.The executive summary should be concise, precise, and complete. If you are using the business plan to apply for a loan, include how the money will be used. EXECUTION OF PROPOSAL: Proposals must contain a manual signature of an authorized representative in the space provided on the proposal submittal form. A polite address. 2. A short introduction 3. The City of West Palm Beach is soliciting bids from qualified, experienced and responsible Contractors to complete the redevelopment of Currie Park. And conditions stated in the RFP, or has clearly identified any variations included in the proposal and proposes and agrees that if this proposal is. Crafting Compelling Business Proposals: A Step-by-Step Guide for Success.