When someone offers to help you make a down payment on a house, your lender will require a gift letter for a mortgage. Here's what it includes.Official Forms for Viewing and Downloading. You must complete the stock donation form to receive a tax receipt letter. Four easy steps to make a legacy gift. Use the Interim Change Form available on our website or at the HCV office, to report all changes. A mortgage gift letter is a statement that assures your lender the money that came into your account is a gift and not a loan. Use the Interim Change Form available on our website or at the HCV office, to report all changes. Download relevant Tax Collector forms. These include assessment removal, military property tax relief, Transient Occupancy Tax Exemption, and applicable forms.