An employment letter is a crucial document you need to secure a home loan. Read about how to write a winning employment letter for mortgage.1. Download the employment letter template. If you work remote, it's important to know what you'll need when applying for a mortgage, and where you can apply for one. You can ask your employer to use this sample letter as a template. This program will help you write a letter that formally requests the money you are owed. This is called a Demand Letter. Mortgage lenders may request a letter to verify your employment. Here's a simple template you can give to your employer to speed things up. A mortgage lender might ask you to write a letter of explanation to better understand your finances when deciding whether to approve you for a loan.