The third umpire may also be used if the Umpire Decision Review System is available and a team wishes to dispute a call concerning a possible catch. Celebration
Before 2000, the Laws of Cricket defined a catch as being completed when the player had "complete control over the further disposal of the ball". In the very strictest sense, this meant that the player did not finish catching the ball until he threw it away, though the player doesnt have to throw the ball to anyone in particular in so doing. For this reason, even today many cricketers celebrate a catch by lobbing the ball into the air. In a Super Sixes match in the 1999 Cricket World Cup, South African Herschelle Gibbs caught Australian captain Steve Waugh but Waugh was given not out when Gibbs was ruled to not have control of the ball when attempting to throw the ball in celebration. Waugh went on to score a match-winning 120 not out to qualify his team for the semi-finals; Australia went on to win the tournament. Records
Test matches
The wicket-keepers with the highest number of catches taken in Test matches are as follows. Note this excludes catches made while not fielding as a wicket-keeper. Source:  Cricinfo Statsguru. Last updated: 19 April 2019. The non-wicket-keepers with the highest number of catches taken in Test matches are as follows. Note this excludes any catches made while fielding as a wicket-keeper. Source:  Cricinfo Statsguru. Last updated: 19 April 2019.
Laws
This method of dismissal is covered by Law 33 of the Laws of cricket which reads:
The striker is out Caught if a ball delivered by the bowler, not being a No ball, touches his/her bat without having previously been in contact with any fielder, and is subsequently held by a fielder as a fair catch,..., before it touches the wicket and ground.This means that the batsman cannot be out caught if:
The ball is called a no-ball or dead ball. The batsman does not hit the ball with his bat or a gloved hand holding the bat. The ball, having been hit, makes contact with the field before a fielder catches the ball. The ball does not remain under the control of the fielder. The ball is hit and lands beyond or on the boundary; (six runs). A fielder taking the catch makes contact with the boundary rope or the area outside the boundary, with any part of his body, equipment, when touching the ball. An airborne fielder taking the catch, having not previously legally touched the ball, had his last contact with the ground not entirely within the boundary.Note that if a batsman could be given out both caught and by another method, caught takes precedence, unless the other method is bowled.If a batsman is out caught, any runs scored off that delivery are voided.