Canada: Canadian citizens will obtain document verification from a Korean Consulate. There are no apostille services in Canada. Your degree and background check just need to be stamped (verified) by the nearest Korean Consulate.
USA: US citizens can use their Secretary of State (list below) to obtain an apostille for their diploma. ALL background checks must be from the FBI, and can ONLY be apostilled by the Department of State in Washington DC!
Alabama: here
Alaska: here
Arizona: here
Arkansas: here
California: here
Colorado: here
Connecticut: here
Delaware: here
District of Columbia: here
Florida: here
Georgia: here
Hawaii: here
Idaho: here
Illinois: here
Indiana: here
Iowa: here
Kansas: here
Kentucky: here
Louisiana: here
Maine: here
Maryland: here
Massachusetts: here
Michigan: here
Minnesota: here
Mississippi: here
Missouri: here
Montana: here
Nebraska: here
Nevada: here
New Hampshire: here
New Jersey: here
New Mexico: here
New York: here
North Carolina: here
North Dakota: here
Ohio: here
Oklahoma: here
Oregon: here
Pennsylvania: here
Rhode Island: here
South Carolina: here
South Dakota: here
Tennessee: here
Texas: here
Utah: here
Vermont: here
Virginia: here
Washington: here
West Virginia: here
Wisconsin: here
Wyoming: here