The scorers have no say in whether runs or extras are scored, wickets taken or overs bowled. This is the job of the umpires on the field of play, who signal to the scorers in cases of ambiguity such as when runs are to be given as extras rather than credited to the batsmen, or when the batsman is to be awarded a boundary 4 or 6. So that the umpire knows that they have seen each signal, the scorers are required to immediately acknowledge it.