"Streamline your mortgage process using our customizable Gift Letter for Mortgage template. Below is a typical gift letter template you can share with donors.How to Fill Out Gift Letter for Mortgage Template? Press the blue "Fill this form" button on this page to open a fillable Gift Letter for Mortgage Template. A gift letter is an important, formal, legal piece of documentation that can help explain that a (usually rather large) sum of money was gifted to you. A gift letter for a mortgage is proof to the lender that money you've been given for your home purchase is a gift, not a loan to be repaid. A gift letter for a mortgage is proof to the lender that money you've been given for your home purchase is a gift, not a loan to be repaid. FHA loan gift funds; USDA loan and VA loan gift funds; Who can give gifts? What gifts are unacceptable? Signature of Donor(s):.