The International Olympic Committee (IOC) has withdrawn doping charges against retired Australian swimmer Brenton Rickard in the Court of Arbitration for Sport (CAS).
Rickard fronted the CAS in November last year after the IOC alleged he had returned a positive doping test from a urine sample taken at the 2012 London Olympics.
The sample, which was re-tested last year, returned an adverse analytical finding for the banned diuretic furosemide.
Australia was set to be stripped of its London bronze medal in the men's 4x100 metres medley relay had Rickard — who swam in the heats of the event — been found guilty of doping.
Hayden Stoeckel, Christian Sprenger, Matt Targett and James Magnussen swam the final, while Rickard and Tommaso D'Orsogna were part of the quartet which contested the heat.
The withdrawal of charges against Rickard followed a rule change relating to the threshold of banned substances in doping samples.
Rickard won three Olympic medals during his career with the Australian national squad.
He claimed two silver medals at the 2008 Beijing Olympics in the men's 200m breaststroke and 4x100m medley relay.
Rickard was also world champion in the men's 100m breaststroke at the 2009 world championships in Rome, and won gold at the 2007 edition in Melbourne in the 4x100m medley relay.
