No harm to show them.
Just share with you my experience.
Normally before the interview the HR will ask you to prepare some document like photo, education doc, 2 months payslip and so on...normally I will bring all, but I won't provide to them if they don't ask. I week after the interview, the HR called to request my 2 months payslip, according to the HR, I am about there, but they need to finalize the package for me AND they will BUY OVER my notification period. I got the offer on the following day and ask me to check with HR to come out the figure that I need to pay and they will issue me a cheaque with that amount.