Requirements. To become a notary public, you must: 1  Be at least 18 years of age. 2  Be able to read and write English. 3  Live in Washington State, or live in Idaho or Oregon while employed regularly in Washington or doing business in Washington. 4  Have a $10,000 surety bond from an insurance company or bonding company. 5  This bond is required to protect the public. 6  We ...