Step 1: Contact the US Consulate in Santiago
We contacted the US Consulate in Santiago by email for information on how to get our incorporation papers legalized. They responded by sending us a Word document with general instructions. This was a helpful piece of information and I am pasting its contents below in entirety:
Authentication of Documents Issued in the United States
DISCLAIMER: THE INFORMATION IN THIS CIRCULAR RELATING TO THE LEGAL REQUIREMENTS OF SPECIFIC FOREIGN COUNTRIES IS PROVIDED FOR GENERAL INFORMATION ONLY. QUESTIONS INVOLVING INTERPRETATION OF SPECIFIC FOREIGN LAWS SHOULD BE ADDRESSED TO APPROPRIATE AUTHORITIES. .
Documents issued in one country which need to be used in another country must be "authenticated" or "legalized" before they can be recognized as valid in the foreign country. This is a process in which various seals are placed on the document. Such documents range from powers of attorney, affidavits, birth, death and marriages records, incorporation papers, deeds, patent applications, home studies and other legal papers. The number and type of authentication certificates you will need to obtain depend on the nature of the document and whether or not the foreign country is a party to the multilateral treaty on "legalization" of documents, The Hague Legalization Convention.
Chile is not a party to the Convention. Therefore, you will have to obtain a series of certifications known as the "chain authentication method". This is literally a paper chase in which authorities will have to attest to the validity of a succession of seals beginning with your document and ending with the seal of the foreign embassy or consulate in the United States.
Chain Authentication
1. Foreign Embassy: This is the last step in the authentication chain. Usually, foreign embassies or consulates in the U.S. can only authenticate the seal of the U.S. Department of State. Check with the embassy or consulate of Chile (http://www.chile-usa.org/consular.htm ) on exact procedures for authentication.
2. U.S. Department of State Authentications Office: The office is located at 518 23rd St., N.W., Washington, D.C. 20520, tel: (202) 647-5002. There is a fee for each authentication payable in the form of a check drawn on a U.S. bank or money order made payable to the Department of State. For additional information, call the Federal Information Center: 1-800-688-9889, and choose option 6 after you press 1 for touch tone phones or visit http://www.state.gov/m/a/auth/. Walk-in service is available from the Authentications Office from 7:30 a.m. to 11:00 a.m. Monday-Friday, except holidays. Walk-in service is limited to 15 documents per person per day (documents can be multiple pages). Processing time for authentication requests sent by mail is 5 working days or less.
3. Documents Issued by Federal Courts: Documents issued under the seal of a federal court should be sent to Justice Management Division, Security Program Staff, Physical Security Office, 9th and Pennsylvania Avenue, Room 6531, Washington, D.C. 20530, tel: (202) 514-2314 or 514-4667 for the preliminary authentication. Then forward the document(s) to the U.S. Department of State, Authentications Office as explained above. Finally, send the documents to the foreign embassy or consulate in the United States.
4. Documents Issued by Federal Agencies: Documents issued under the seal of a federal agency can be authenticated by the U.S. Department of State Authentications Office following the instructions above. Then send the documents to the foreign embassy or consulate in the United States as explained above.
5. State Documents: State documents such as documents originating with a state court or agency (birth, death, marriage, etc.) must be authenticated by the appropriate office in the state Secretary of State's office (listed below). The document may then be authenticated by the U.S. Department of State Authentications Office as explained above. The document may then be authenticated by the foreign embassy or consulate in the United States following the instructions above.
6. Notarized Documents: The procedure for authenticating documents executed before a notary public such as affidavits or acknowledgments varies from state to state. It is advisable to contact the state authentication authority to learn what steps are necessary between the notary's seal and the state Secretary of State's seal. In some states, this requires contacting the clerk of the court of the county where the notary is licensed, and obtaining an authentication of the notary's seal. The state Secretary of State's office can then authenticate the seal of the clerk of the county court. After the seal of the state Secretary of State or comparable authority listed below is on the document, it may be authenticated by the U.S. Department of State Authentications Office. The final step is to obtain the seal of the foreign embassy or consulate in the United States following the instructions above.
Using the Internet: Many of the judicial assistance flyers are also available on the Internet via the Department of State, Bureau of Consular Affairs home page under Judicial Assistance http://travel.state.gov/law/info/judici ... l_702.html .


