But most gifts are not subject to the gift tax. Use Form 709 to report: Transfers subject to the federal gift and certain generation-skipping transfer (GST) taxes.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. For more information, see the instructions for completing Form 140NR. If you request an extension to file your 2023 calendar year tax return, your due date is. October 15, 2024 to timely file your 2023 tax return. A gift letter is proof to the lender that the funds were gifted to a homebuyer for their home purchase, and not a loan or borrowed money. A gift letter is one of the most important legal documents to prove the asset is yours. Close-up of gift details on form. The letter should include the exact dollar amount of the gift and the date of transfer.