After the GRE exam,
you will see your scores. You will be given the option to cancel the score. Cancelled scores will not appear on your score report. Universities will not know that you had cancelled a score earlier.
Cancelled scores can be reinstated within 60 days by paying a fee of
USD 50. If you take the GRE and don’t get a good score, you can cancel the score and retake the exam after 21 days. If this second score is lower than the previous one that you had cancelled, you can reinstate the previous one.