There are two ways to get a CBC.  It depends on the how fast you need one and where you're located.
1.  You can go to your local police department and request your CBC at the station.  Don't forget you must request for a State Level CBC.  Depending on the state, you'll be required to get finger prints done at the station for the process.  After all the proper applications are fill out, you should get your CBC within 2-4 weeks depending on your location. ( Finger printing is required for CBC, if you're applying for a CBC )
2.  You can contact a company that does CBC.  You must be careful when you plan to use one of these companies.  Since majority of them aren't official CBC's, they do not do any detail background checks.  They usually use public records to gather the CBC.  These CBC's will not be accepted and will not be considered verification by the State or Korean Government.  There is only 1 company to our knowledge that does official CBC's.  They do cost quite a bit compared to getting one from the police department.  But they do all the hassle of getting your paperwork done for you.  Usually turnout is 2 weeks from initial application is turned in. Certain States still require finger printing and some States don't when you use an official CBC company.

To get a Criminal Background Check for South Africians, you must go to Pertoria it's best to do it in person for fastest result.  If you mail it in, it'll take anywhere from 2-4 months.  If you take it in yourself it'll take only 2-3 weeks for the CBC.  You must go to this address 
271 Schoeman street
1st Floor Sanlam Place
West Building, Pertoria
0002 South Africa
Tel: 012-393-3712
contact person : Me Heloise Van Der Mescht 
After you get your CBC, you must take it to Foreign Affairs office in Pertoria to get your apostille.  You should be able to get it back on the same day.

Criminal Record Check Guideline ( New Zealand )
Due to provisions of the Privacy Act 1993, the Ministry requires a signed authority from you before we can access your information. The Ministry of Justice is unable to provide your information over the telephone. You must apply in writing on the correct form.
You can obtain the information about yourself by applying to the Privacy Unit of the Ministry of Justice. The request is made on the following application forms that are designed to ensure that the information you are requesting actually applies to you and not to another person.
1. Priv/F1 - Request by Individual
This form is used to determine eligibility under the Clean Slate criteria. The form may be used to obtain a full record of your criminal history held by the Ministry.
Download the form (PDF 207KB) to print a copy for your use by clicking on the following link: http://www.justice.govt.nz/privacy/request-by-individual.pdf
2. Priv/F2 – Request by Third Party
This form authorizes the release of the information to a third party e.g. another person or agency.
Download the form (PDF 207KB) to print a copy for your use by clicking on the following link: http://www.justice.govt.nz/privacy/request-by-third-party.pdf
3. Priv/F3 – Request by Third Party (Section 19 Exception to Criminal Records (Clean Slate) Act 2004)
This form provides for specific exceptions where a complete criminal record is required. The form is available in hard copy and can be obtained from your local District Court . Alternatively , you may ask for the applicable form to be sent to you by writing to:
The Privacy Unit
Ministry of Justice
National Office
PO Box 2750
Wellington.
Or by contacting a Privacy Assistant on telephone +64 (4) 918 8800, or fax +64 (4) 918 8974.
Note that you cannot obtain the information from the Office of the Privacy Commissioner. If you write to the Privacy Commissioner's Office, your letter will be referred to the Ministry of Justice.
This will delay the processing of your application.
Application requirements
Full instructions are on the forms. Please take particular care to complete all applicable sections of the form.
You need to complete the application form to enable the person accessing the records to be able to identify you correctly. Many people write a letter but do not give their date of birth or their full name.
This makes it almost impossible to identify the correct person and causes a delay while we obtain full identification information from you. The completed form will need to be signed by you and accompanied by a signed form of identification, specifically a photocopy of your passport or drivers license. Please do not send original identification.
Alternatively, a signed proof of identity (which is a section in the application form) will be accepted. Forms unaccompanied by suitable identification will not be processed, ultimately delaying your request for information.
Please forward the original application form only, as we are unable to accept faxed applications unless you have specific arrangements with the Ministry or reside overseas.
A copy of your application is kept for three months and is then destroyed. Your information is kept in a secure area which has restricted access.

This is a list for directions on obtaining police clearance certificates from Australia
• The 'Certificate of No Criminal Record' can be obtained by applying by mail to the following address:
Criminal Records Australian Federal Police at:
Locked Bag 1
Weston ACT 2611
• Provide a completed form 1101 , obtainable from the nearest DIMIA office or Australian mission overseas plus evidence of identity.
• Resident applicants should provide a stamped self-addressed envelope.
• Non-resident applicants should provide an international postal reply coupon.
• Fee payable by bank cheque or international money order if non-resident.
Application is to be forwarded to:
The Visa Clerk Criminal Records Unit
P.O. Box 7777
Parramatta NSW 2124
Australia
All of the following must be supplied:
a) Full set of fingerprints taken and certified by any recognized police official.
b) Date of birth.
c) Country for which the certificate is required.
d) Name and address of the authority requesting the certificate.
e) International Bank Draft/Money Order in AUSTRALIAN DOLLARS for AUD 52.00 per person, made payable to the N.S.W. Police Service. Cheque is to have an endorsement to any Australian Bank.
Applications not providing all of the above will be returned.
This office takes 2-3 weeks to process applications