There are many benefits to using a notarized affidavit on professional letterhead template. First, it is a convenient way to create a legal document. You can simply download a template and fill it out with your information. Second, it is a cost-effective way to obtain a notarized document. Third, it is a secure way to protect your information. A notary public is a trusted third party who will verify your identity and ensure that your document is properly executed.