Hello,

Stray vacancy means if any college have extra seats then they will organise this kind of round. Most of the college open the participants registration in their own website and you can go there for registration. In this case you have to register again for college wise.

But note that you have to go every college site individually and apply for it. But it's not that kind of counselling registration so you can't pay there. You just register the college website for admission. When they call you, you have to present there with all original documents.

All the best.