Mark Orr, your go-to Mobile Notary, has seen it all — and the good news is that the most common notarization mistakes are also the easiest to avoid. If you're heading into an appointment, here's what Mark's other clients wish they'd known beforehand. Mistake #1: Signing the Document Before the Appointment This is the number one mistake, and Mark sees it regularly. Many documents require that you sign in Mark's presence — not at home the night before. If you've already signe