Explain what caused the employment gap, and be honest about it. There are lots of reasons why people aren't employed.I am writing to provide an explanation for the gap in my employment history as indicated in my mortgage application. Mortgage lenders might request a letter of explanation for various red flags that come up in underwriting. Learn how to write one, and download a template. A letter of explanation is a brief document you can use to explain something, like a previous bankruptcy, in your financial or employment history. Most lenders will only require a two-year work history, so if you had gaps prior to that period, you may not even need to inform your lender about it. Use our free Contra Costa County, California mortgage closing costs calculator to quickly estimate your closing expenses on your home mortgage. Los Altos was incorporated in 1952; most of the City's growth occurred between 1950 and 1980. Your County Website (e.g.