Hello

Yes it is true .

Many college at the time admission collect their students documents for their course time period.

They take HSC certificate, domicile certificate and etc . So before admission just make sure that you have all your documents Xerox copy . Which you can use it when you need .

don't worry about that they will give all your documents after course completion and if someone already submitted their documents they can ask for documents in college when they need it . College will provide you some Xerox copy of it.

I hope this helps you

Good luck