A letter of explanation consists of short descriptions you can use to fill in the gaps in your paperwork for your underwriter. I am writing to provide an explanation for the gap in my employment history as indicated in my mortgage application.I would suggest a few things to say in the letter. Explain what caused the employment gap, and be honest about it. Clearly explain where the money has come from, where it is going, the gaps you have in your employment, or any other issues that your lender might have raised. 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 included in your mortgage application to help clarify inconsistencies or gaps in your financial records or credit history. Employment gaps are allowed to qualify for a mortgage. You do not have to have two years of continuous full-time employment to qualify.