Lamptey was given a life ban by world football's governing body in March of last year for match-fixing following a number of suspect decisions in a World Cup qualifier between South Africa and Senegal in November 2016.

The reason behind the decision, which Lamptey unsuccessfully appealed to the Court of Arbitration for Sport (CAS), has now been made public by FIFA.

The CAS found Lamptey had "intentionally taken two wrong decisions with the sole purpose of enabling a specific number of goals to be scored that would make pertinent bets successful", FIFA said in a statement today.

"The CAS concluded that there was an obvious link between these intentionally wrong decisions and a deviation from an expected betting pattern, and consequently found Mr Lamptey guilty of having unlawfully influenced the result of the match," it added.

Lamptey made a number of controversial decisions in the match, which South Africa won 2-1.

He gave the home side a spot-kick in the 43rd minute, wrongly given for handball against Senegal defender Kalidou Koulibaly and converted by Thulani Hlatshwayo.

Video footage showed the ball had hit Koulibaly on the leg.

FIFA also said Lamptey, who refereed at the 2015 Africa Cup of Nations and the 2016 Olympic Games in Rio de Janeiro, was at fault for South Africa's second goal just two minutes later.

"Suspicious betting activities reached their climax precisely when Lamptey took the incorrect refereeing decision between the 40th minute and the end of the first half," the FIFA statement read.

"[He] clearly took two wrong decisions, which led to two goals being scored by South Africa."

Neither South Africa nor Senegal broke any rules and were not involved the "match manipulation" outlined by FIFA.

The match was subsequently replayed in November of last year, where Senegal qualified for the next year's World Cup in Russia with a 2-0 win.