If a promissory note is transferred as a gift, gift tax rules may apply, according to IRC Section 2501. 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.The IRS taxes gifts made over a certain dollar amount. The general rule is that any gift is a taxable gift. However, there are many exceptions to this rule. What Are The Tax Implications of a Gift Letter? Let's look at the tax implications of receiving a gift for your down payment and how you can minimize your risk. Gift Letters And Taxes. Gifts given for real estate purchases typically do not result in any taxes. This applies to both the giver and receiver.