Briefly specify why the document contains two signatures. You can use the subsequent paragraphs to provide additional details about your ideas.(Personalized Seal). An attached sample letter has been provided to assist our customer. Date: Owner Agent (Requires a notarized Letter of Agent.) Note: Certificates are only issued in the name of the owner of the property. Writing a professional business letter? Coming to a close and signing off properly is important. â—¦ Write a letter to your landlord. This letter is called a. Who support the Archdiocese of San Antonio.