You must make certified copies of all documents you copy when you present your visa application.
Typically certification is required for:
- Birth certificates
- Marraige certificates
- Copies of qualifications
- Copies of employment references
- etc
To have documentation certified you need to take your original transcripts / documents and a copy of each transcript to an authorised person in your community.
Authorised persons include Juctices of the Peace, Notary Publics, lawyers / solicitors, Magistrates offices and (in some countries only - Police Officers and School Teachers or University professors.
They need to sign on your copies that they are true and correct, print their name and position and if possible affix an official stamp