Your gift letter has to be backed up with paperwork. PLEASE READ BEFORE FILLING OUT ON-LINE FORMS.Adobe Reader XI is required to be able to save a filled out copy of your filing for your records. Gift Letter For Mortgage Template. Your lender might give you a template to follow if you tell them you're using a gift for your down payment. Opt-out Form: Other. 200314. These forms may be filled out online and printed for filing. A copy of this form and a sample form are also included with this guide. 2. A gift letter is a note from a donor to your lender regarding cash funds for your mortgage down payment. These forms may be filled out online and printed for filing.