You can ask your employer to use this sample letter as a template. A typical NYC co-op board application will require three to six personal and professional reference letters per applicant.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. 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. Apply to Mortgage Processor, Mortgage Manager, Closer and more!