as of dec 31, 2010, korea will only take an fbi background check.
it's easy, but takes about 3 months. do it here:
http://www.fbi.gov/hq/cjisd/fprequest.htm
====================================================
this is how i did it while in my hometown of san diego in july 2010. Background checks are also referred to as: Criminal History Reports, Vulnerable Sector Screenings, CPIC Searches, Subject Access Forms, Letters of Good Conduct, Criminal Background Searches, & Criminal Clearance Letters.
7/14 today i went to the san diego sheriff's office License Division asked for a "Good Conduct Letter." They gave me the application, i filled it out, showed my id, and paid the fee. i couldve picked it up 3 days later, but i asked they just mail it to me. if youre in san diego, the adrs is:
San Diego Sheriff Lic. Division
9621 Ridgehaven Ct
San Diego, CA 92123
858-974-2020
7/20 got the good conduct letter in the mail.
7/21 Today,
i sent the good conduct letter to the state dept to have it legalized with an apostille. it cost me $20. i sent the good conduct letter along with a SASE and my own letter saying i am applying for an e-2 visa for south korea...
if you are in cali like me:
California Office of the Secretary of State
Business Programs Division
Notary Public Section
P.O. Box 942877
Sacramento, CA 94277-0001
916-653-3595
7/31 got the letter from the sheriff back today. i did not get the apostille b/c i didnt get the sheriff letter notarized, so i have to do that & re-send. dammit.
08/02 went back to the sheriff & got my letter notarized. mailed it off again for the apostille.
08/11 got the cbc with apostille today. horray!