How to fill out the Insurance Proposal Form: Guidelines and Instructions? Creating an effective insurance proposal is made easier with a template.An insurance proposal is a legal document that provides the details of your client and what is being insured. This fillable insurance proposal template allows you to provide a detailed business proposal of several commercial insurance products to your clients. This versatile Insurance proposal template will do the job just right. Track which insurance plans your client is interested in. A proposal template is like your go-to framework for crafting insurance proposals. Instead of starting from scratch each time, it gives you a structured layout.