Hello ltika...

College leaving certificate is given at the time of completion of your course or you can say degree for the course you were enrolled in there.

If you don't have your CLC till now (I guess you may  not have taken clc at the time of leaving your college) .You can get your certificate by visiting your college with an application demanding for your CLC .They will provide it to you as  there is a proper record of the students that they maintain.

I hope it'll be helpful...

Thanks