[Nevadaref]

Originally Posted by BillyMac

Thank you. Now let's "twist it up" a little more.

After the first successful free throw by A1, the correctable error is discovered during a dead ball period after a common rebounding foul by A2 after the ball rebounds off the ring, and all are certain the try will not be successful.

2-10-4: If the error is a free throw by the wrong player or at the wrong basket, or the awarding of an unmerited free throw, the free throw and the activity during it, other than unsporting, flagrant, intentional or technical fouls, must be canceled.

4-20-3: The free throw ends when the try is successful, when it is certain the try will not be successful, when the try touches the floor or any player, or when the ball becomes dead.

What happens next (assume that Team B is in the bonus)?

I’m taking your scenario of the rebounding foul to occur prior to any player touching the ball. Therefore, the clock has not properly started and the error of awarding unmerited FTs is correctable. Hence, both FTs and all activity which occurred during them are canceled. However, the rebounding foul stands as it happened after the FT ended. So proceed to the other end and award bonus FTs to the Team B player who was fouled by A2.