The letter must explain who is gifting the money, where the donor's funds are coming from and the relationship between the donor and the recipient. Yes, your gift letter needs to be notarized.Also, both the donor needs to sign it to make it valid. 1. Verify donor section. Fill out Part B Completely. 2. A medallion signature guarantee must be completed in person because it confirms your identity, signature and legal authority to transfer securities. This page contains forms, policies, and manuals for estate administration in Philadelphia. Filling Out the Form Properly. A signature created using thirdparty software. Note.