한국 법정의 판결문을 자격증이 있는 (certified translator) 자가 번역을한후에 서울에 미국 대사관 안에 있는 영사과에가서 seal of the embassy 하나 찍어달라고 해서 한국 에서 원하는 곳에 내어보세요.
In some cases, an authenticated copy of a marriage or divorce certificate will be required when you need to use a legal document from one country in another country. An authenticated document is one that a government authority has certified as genuine. In the case of a foreign document, authentication happens either by obtaining an apostille (in countries party to the Hague Legalization Convention) or by having the document authenticated by the local U.S. embassy or consulate. This is not a form a registration, but simply the placing of the seal of the U.S. embassy or consulate over the seal of the foreign court. See Notarial and Authentication Services of U.S. Consular Officers Abroad for a detailed discussion of the authentication process. For country specific information, see the U.S. Citizens Services section of the relevant U.S. Embassy website.
출처;
http://travel.state.gov/content/passports/en/abroad/events-and-records/divorce/divorce-legal-issues.html