Mobile Notary: What It Is and When You Need One Some documents can't wait for you to find a bank branch open at the right hour. A mobile notary comes to you — home, office, hospital, care facility, jail, hotel, or coffee shop — and performs the notarization on the spot. What it is. A notary public is commissioned by the Texas Secretary of State to verify a signer's identity, confirm the signing is willing and knowing, and complete a notarial certificate. "Mobile" describes th