Explanation from Deepak is more than enough and I got my wife's transcripts as he told. Still I want to add some points
1. You can got directly to Oriental Bank of commerce and pay the fee (100 per DMC/Degree copy + speed post fee).
2. Make sure that your application is complete because no one will check your application while accepting it and you will get a call later on if there is any problem.
3. You also need to write an application for transcript, this does not have any specific format so a normal application requesting for transcript will be enough. Write this application at home and make sure that your address and phone numbers are mentioned on you application correctly.
4. For any further question, contact deepak