South African long jumper, Luvo Manyonga, has been handed a four-year ban after failing to meet whereabouts criteria, according to the Athletics Integrity Unit.
Manyonga, who took silver at the Rio Olympics in 2016, will now likely miss next month’s Tokyo Games.
In January, Manyonga was temporarily banned for failing to notify anti-doping authorities of his location.
The 30-year-old can appeal the ban at the Swiss-based Court of Arbitration for Sport.
Athletes must let authorities know their intended whereabouts to allow anti-doping officials to find them.
If they fail to show or give wrong information three times in a year they can be punished.