What are the things that were asked by current employer to previous employer during BGV?

What are are things asked by current employer to previous employer during BGV?
Like I'm working in 3rd switched company. But I don't want to show my first company.

Please!!! Can any HR help me out here?
PLEASE

There is no laid down formula on the questions that can be asked during BGV, it would depend entirely on the current employer. In general terms it can be said that they would be seeking feedback on the performance and conduct in one way or the other.

Dear madam,
There is no standard format followed by companies and it is tailor made based on company's requirements.
But generally it seeks to know information on designation/nature of work, period worked, salary , conduct with others, how performed his/her job and specific reasons for leaving and whether company would like to rehire in future if suitable opportunity is available etc.
Regards,
Vinayak Nagarkar
HR and Employee Relations Consultant

So,I have only two concerns below
1. can I say that it is easy to hide my first company?
2. what if they find it in future?