Dear student,

Basically, when you took admission in some college, then you have to go through various kind of fee structures. And Security Deposit is one of them. Now as you have not mentioned your college name. But let me tell you that,vsecurity deposit is returned when, you complete your course. Means, at the end of your course, you will get your security deposit back.

For more info, you can read your college's admission brochure. All the info is there.

Hope it helps.