The scorer mistakenly credits a field goal by A1 to B1 and Team B in the second quarter. The regulation game ends with the score tied. During a time-out in overtime, the scorer detects the mistake and advises the referee.
The referee will have the mistake corrected. The overtime will continue with the corrected score. Once the ball becomes live in the overtime, the overtime will be played even though a subsequent correction of an error or mistake changes the score. A bookkeeping mistake can be corrected at any time until the final score is approved.