Yes, your gift letter needs to be notarized. Also, both the donor needs to sign it to make it valid.A gift letter must contain the donor's name, the gift's value, confirmation that the gift is not to be repaid, and the donor's signature. Mortgage gift letters tell the lender that money for your loan came from a gift. Lenders require gift letters when necessary. Fill out Affidavit of Gift: You'll need to complete an Affidavit of Gift form. Pay Fees: Be prepared to cover the necessary title and registration fees. You can write your own gift funds letter if you wish. There are many mortgage gift letter template options out there to choose from. Here's what your gift letter should include: The donor's name, address and phone number.