Since you have not specified which exam's counselling sessions you are talking about so I will give you a generalised answer.

Generally the document verification process goes on for about 4-5 days after revelation of the round lists if you missed out one day you can visit another day before it gets over.

If you are concerned about jossa counselling visit their website or call them.

www.josaa.nic.in

And if its UPSEE counselling I suggest you contact them.

www.upsee.nic.in