Q: re election "what if"

Strictly out of curiosity, what would happen if something happens to alter the vote tally after a candidate concedes?
For example, say a candidate admits defeat but there arises proof of voter count discrepancies soon after, or a ;ast minute skew for one the defeated candidate?
Just curious (given how often I’ve seen politicians concede without all votes being completely counted).

oops never mind. Been asked elsewhere.
(Mods? Can you delete?)
THanks

Exactly where is “elsewhere,” if you please?

Elsewhere