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Meet the People Behind East Bay Notary Express

Local expertise. Professional care. Personal service.

About East Bay Notary Express

A Local, Family-Owned Notary & Apostille Service Built on Trust, Accuracy, and Personal Attention

Welcome to East Bay Notary Express, Mobile Notary & Apostille!

We’re Sue and Joe, the team behind East Bay Notary Express, a family-owned business based in Antioch, California.

We provide mobile and in-office notary services, apostille facilitation, loan signings, estate planning notarizations, professional translation coordination, and document courier services.

Whether you’re handling an important family matter, signing business documents, or preparing paperwork for use overseas, we’re here to make the process more convenient, organized, and approachable.

Our Story — From Science & Engineering to Notary Services

Before establishing East Bay Notary Express, we built professional careers in biomedical science and engineering, bringing more than 25 years of experience in fields where precision, responsibility, and attention to detail are essential.

Those experiences shaped how we approach our work today.

We believe that professional service goes beyond completing a transaction. It means listening carefully, communicating clearly, respecting our clients’ time, and treating important documents with care.

We bring that same thoughtful approach to every appointment, whether it’s a straightforward notarization or an international document-processing request involving multiple agencies.

Meet Sue & Joe

Woelsung (Sue) Yi, PhD

California Notary Public | NNA Certified Notary Signing Agent | Biomedical Scientist

Sue holds a PhD from the University of Minnesota, Twin Cities, and has worked in biomedical research at leading institutions, including Memorial Sloan Kettering Cancer Center and Hospital for Special Surgery.

Her scientific background has developed a strong appreciation for accuracy, careful procedures, and clear communication.

Sue brings these qualities to her notary and document services, with an emphasis on being approachable, attentive, and respectful of each client’s individual circumstances.

Jongseung (Joe) Park, PhD

California Notary Public | NNA Certified Notary Signing Agent | Engineer

Joe holds a PhD from the University of Minnesota, Twin Cities, and has extensive engineering experience, including work with technology companies such as Marvell, Broadcom, and Seagate.

His engineering background reflects a methodical, detail-oriented approach to professional responsibilities.

Joe brings that experience to notarization appointments and document-handling services, emphasizing organization, dependability, and careful execution of notarial procedures.

Our Professional Credentials

Both Sue and Joe are California commissioned Notaries Public, NNA Certified Notary Signing Agents, background screened, bonded, and E&O insured.

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How We Help Our Clients

We offer more than a single type of notary appointment. Our services support individuals, families, businesses, and professionals with a wide range of document-related needs.

Mobile Notary Services

We provide mobile notary services and travel to homes, offices, hospitals, care facilities, and other agreed-upon locations. Evening, weekend, and same-day appointments may be available.

Estate Planning & Loan Signing Notarizations

We provide notarial services for estate planning documents, real estate transactions, loan signings, and other documents presented for notarization. We also work with attorneys, title companies, and other professionals to coordinate convenient signing appointments.

Apostille & International Document Services

We assist with California apostille processing, federal document authentication, and embassy or consular legalization coordination.

For eligible California-issued documents, we can assist clients nationwide with apostille processing without requiring them to travel to Sacramento.

Professional Translation & Document Courier Services

Through professional translation partners, we coordinate certified, notarized, sworn, and apostille-related translation services as available.

Our document courier services also support pickup, delivery, and submission of documents to designated government offices and other destinations.

Why Clients Choose East Bay Notary Express

Personal Attention. We are a family-owned business, and clients communicate directly with the people handling their appointments and service requests.

Professionalism and Care. We understand that many documents involve important personal, financial, family, or business matters. We approach each appointment with respect, care, and attention to detail.

Convenient Scheduling. Our mobile and appointment-based services offer flexibility for busy individuals, families, and professionals.

Clear Communication. We explain our service options, appointment logistics, fees, and processing arrangements so clients know what to expect.

Local Commitment, Broader Reach. We proudly serve our East Bay neighbors while also assisting clients outside California with eligible document authentication and apostille processing.

3C How We Help Why Clients Choose Us

Proudly Serving Antioch and the East Bay

East Bay Notary Express is based in Antioch, California, serving Antioch, Brentwood, Oakley, Pittsburg, Bay Point, Concord, Discovery Bay, and surrounding East Bay communities.

We offer flexible appointment scheduling, including evenings and weekends, subject to availability.

Our apostille and document-processing services also extend beyond our local service area, allowing us to assist clients nationwide with eligible documents.

We're Here When You Need Us

We know that important paperwork doesn’t always arrive at a convenient time. Whether you’re planning ahead or need assistance with a time-sensitive request, we’d be happy to discuss how we can help.

East Bay Notary Express, Mobile Notary & Apostille

Antioch, California

Please note: We are not attorneys and do not provide legal advice, prepare legal documents, or determine legal requirements. Apostilles and authentication certificates are issued by the appropriate government authorities. Translation services are coordinated through professional translation providers.