You have asked a very generic question. The answer to the same is, the negative impact will stay for a long time. The candidate can be asked to leave the company or terminated for providing a fake certificate. It is directly a breach of trust.... So, it is always advised that we should not start a career with a negative step or false documents.
As far as the future of the candidate is concerned, even if he has chosen to rectify his mistake, the current employment, may give a negative feedback, which will never change. Also once a breach of trust, it is very difficult to repair the same.
But i was thinking that if a candidate terminate by the current employer within 2 days from joining
and after this candidate go for the new company with correct experience and this company also do background screening for new joining so previous background screening will impact on this or not