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Authentication and Legalization Service for Taiwan

Updated: Feb 27, 2023

What is Authentication or Legalization?

Making a document issued in one country valid for legal purposes in other countries is called authentication and legalization. Authentication proves that the signature and the seal on the document are genuine and it makes the document effective, valid, and recognized in another country.

The documents issued in the U.S. and intended for use in these non-Hague Apostille countries will be required to complete the authentication process, which may involve multiple steps and several government agencies.

If the country of use is a Hague Apostille country, only Apostille is needed, a much more simplified process of authentication. The countries that joined the Hague Apostille Convention reached an agreement on abolishing the requirement of legalization for Foreign Public Documents.

This is why you may have heard that some documents require Apostille, but others need Authentication or Legalization. It all depends on whether the country of use has joined the HAGUE CONVENTION OF 5 OCTOBER 1961.

How to authenticate and legalize documents issued in the U.S. for use in Taiwan?

Taiwan is not a member of the Hague Apostille Convention. Any documents issued in the U.S. destined for use in Taiwan require authentication by the Secretary of State, the U.S. Department of State, and the Taipei Economic and Cultural Representative Office in the U.S. (TECRO) The specific government agencies involved in the authentication vary by document type.

No matter whether it's a document notarized by a local notary, a local and state document issued by the court or official department, or it's a federally-issued document, they all can be authenticated.

👉 For notarized or local and state documents:

  1. Secretary of State Authentication

  2. the U.S. Department of State Authentication

  3. TECRO Authentication

Tips: Documents issued in these 7 states need additional authentication before being presented to the Secretary of State's office.

👉 For federally-issued documents:

  1. the U.S. Department of State Authentication

  2. TECRO Authentication

The Consular Jurisdictions of the Embassy/Consulates of Taiwan in the U.S.

Taiwan has one Taipei Economic and Cultural Representative Office (TECRO) and twelve Taipei Economic & Cultural Offices (TECO) in the United States.

TECRO in Washington DC

Address: 4201 Wisconsin Ave, NW, Washington DC 20016

TECO in Atlanta, GA

Address: 1180 W Peachtree St NW Ste 800, Atlanta, GA 30309

TECO in Boston, MA

Address: 99 Summer Street, Suite 801, Boston, MA 02110

TECO in Chicago, IL

Address: 55 West Wacker Drive, Suite 1200, Chicago, IL 60601

TECO in Denver, CO

Address: 1600 Broadway Ste 1740, Denver, CO 80202

TECO in Hagatna, Guam

Address: 111 Chalan Santo Papa, Suite 505, Hagatna, Guam 96910

TECO in Honolulu, HI

Address: 2746 Pali Highway, Honolulu, HI 96817

TECO in Houston, TX

Address: 11 E Greenway Plaza, Suite 2006, Houston, TX 77046

TECO in Los Angeles, CA

Address: 3731 Wilshire Boulevard, Suite 700, Los Angeles, CA 90010

TECO in Miami, FL

Address: 2333 Ponce De Leon Blvd, Suite 610, Coral Gables, FL 33134

TECO in New York, NY

Address: 1 East 42nd Street, 4th Floor, New York, NY 10017

TECO in San Francisco, CA

Address: 555 Montgomery Street, Suite 200, San Francisco, CA 94111

TECO in Seattle, WA

Address: 600 University St., Suite 2020, Seattle, WA 98101

Documents we authenticate

These documents may include :

(This list is not all-inclusive. Please contact us if your document is not listed below.)

  • Birth Certificate

  • Death Certificate

  • Marriage Certificate

  • Divorce Certificate

  • Court Document

  • FBI – Background check

  • Background check of the local police department

  • U.S. Residence Certificate/Affidavit

  • Name Change Certificate/Petition for Name Change

  • Driver's License

  • Certificate of Naturalization

  • Any Translated Document

  • IRS Form-6166

  • Single Status Affidavit

  • Affidavit of One and The Same

  • Gift Affidavit

  • Waiver of Inheritance

  • Power of Attorney of Real Estate Transaction

  • Power of Attorney of Divorce Proceedings

  • Other Powers of Attorney

  • Proof of Income

  • Employment Verification Letter

  • Bank Statement

  • Diploma

  • Transcript

  • Health Certificate/Medical Letter

  • Home Study

  • Child Adoption Documents

  • Articles of Incorporation/Articles of Organization

  • Amendment

  • Company's Annual report (Statement of information)

  • Bylaws (Operating Agreements)

  • Good Standing Certificate

  • Business License

  • Meeting Minutes

  • Board Resolutions

  • Shareholders' Resolutions

  • Corporate Stock Ledger

  • Financial documents

  • Bank documents

  • Tax documents

  • Contracts

Besides Taiwan, we also authenticate documents destined for use in other non-Hague Apostille countries. The authentication process can be complicated, time-consuming, and distracting that requires expertise and experience. So just leave it to us! Our experts can provide you with a full range of fast services that allow you to save time and focus on your own careers and key areas.


American Notary Service Center Inc. provides fair, fast, confidential, and professional document notarization and certification services for our clients. We also provide various assistance services to small businesses led by socially and economically disadvantaged groups. Our service helps small businesses obtain federal government contracts, gain a foothold in the market, and boost their sales. For more information, please visit our website at, and contact us by calling 202-599-0777 or by email at


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