Services include witnessing the signing of important documents, taking affidavits and depositions and giving oaths. This article and video will show Notaries to fill out each part of a notarial certificate, and common mistakes to avoid.You may need to fill out and attach a separate Notary certificate if there is no room on the document for your Notary signature. How to Notarize a Document (4 steps). Completing the Document; Gather the Signers; Find a Notary Public; Distribute Original Copies. 1. The application includes an oath of office, which must be sworn and notarized. Bank of America provides notary services free of charge in all financial centers. Schedule an appointment and learn what is needed for a notarization. The answer is that real estate purchase agreements do not need to be notarized or witnessed in order to be legally binding. Step 2: Fill out Encroachment Policy.