Woelsung (Sue) Yi of East Bay Notary Express is a California Notary Public based in Antioch, CA, serving Contra Costa County and the East Bay. I provide friendly, professional support for clients who need reliable notary and document-related services at a convenient location or on the go.

My services include mobile notary appointments, apostille assistance, certified translation, courier support, and retail notary availability. Whether you are handling personal, business, or time-sensitive documents, I focus on clear communication, careful handling, and dependable service from start to finish.