Tunisian club will have to pay Congolese striker Fabrice Ondama $856,000 within 30 days or be banned from signing players.
FIFA on Tuesday delivered the verdict after Ondama accused the club of unfairly terminating his contract in January 2018.
The club was also ordered to pay a fine of $30,000.
Ondama took the club to FIFA when his contract was terminated in January 2018. He had been signed in July 2017 in a deal worth $150,000 and $500,000 annual salary. He was recruited by Slim Riahi the former club president, who is currently on the run after being charged with corruption offences in Tunisia.
The striker played only three matches for the club before rupturing his cruciate ligaments and was sidelined for the rest of the year. He left the club without receiving a single penny from his salary or the signing fee.
Current club president Bab Jedid had claimed that they had reached an agreement with Ondama over the pending payments. However, with the new developments, it looks like Ondama never entered into an agreement with the Tunisian club.
The club has had multiple payment disputes with a number of former players and coaches.