The International Olympic Committee has issued "severe reprimands" to British boxer Anthony Fowler and Irish fighters Michael Conlan and Steven Donnelly for betting on fights in Rio, contrary to Olympic rules.
As they were not betting on their own contests, the trio have escaped without bans but they have been told they must take part in "integrity education programs".
There are also reprimands for the British Olympic Association and Olympic Council of Ireland for failing to educate their athletes that they are not allowed to gamble on Olympic events.
"Protecting the integrity of sport at the Olympic Games is a top priority for the International Olympic Committee," the IOC said in a statement.
It added that a number of new measures were put in place for Rio 2016, including a "joint integrity intelligence unit" and a "reinforced integrity betting intelligence system".
All three boxers were found guilty of placing bets on bouts at Rio 2016 by a disciplinary commission chaired by senior IOC member Denis Oswald.
These reprimands cap very disappointing Games for the fighters, particularly the highly-fancied Conlan. A bronze medallist at London 2012 and world champion in 2015, the 24-year-old bantamweight was controversially beaten in the quarter-finals by Russian Vladimir Nikitin.
Conlan reacted furiously to a result that looked even stranger a day later when AIBA sent several judges and a leading official home amid widespread criticism of the scoring.
The 25-year-old Fowler, a cousin of former Liverpool striker Robbie Fowler, was well beaten in his only fight in Rio, while Donnelly also lost in the quarter-finals.
