In this article, we discuss how to write a letter with two signatures and provide an example letter for you to use as a reference. It is recommended that signatures be inscribed in the presence of the notary instead of completed beforehand.Once the identification and signature verification. 1. Completely fill out all three (3) Diligent Search Letters (Form B) with your information, the other party's information and have them NOTARIZED. A notary public must use a certificate in substantially the following form in notarizing an attested copy. These FLORIDA-specific notarial certificates and forms are being provided for your convenience. All are statutory as referenced in the form description. Does the signature on our cover letter suffice as a "signed proposal" as stated in. Part I.B. on page iii? On this page, you will find: Document Checklists: These checklists outline the required documents for the most common application types.