Toulon said in a statement that Radradra had agreed to switch codes, signing a one-year deal with an option for a further 12 months.
Parramatta has not confirmed the departure of Radrada, who has had a warrant for his arrest in Australia placed on hold until Wednesday.
Radradra did not appear at a scheduled domestic violence hearing in Parramatta on Monday, having flown to Fiji last Wednesday due to a medical emergency surrounding his father.
But magistrate Tim Keady refused to accept the doctor's note provided by Radradra's defence as justification for his absence, revoking his bail and issuing the warrant, which is suspended pending an explanation for the 24 year-old missing the hearing.
"The Parramatta National Rugby League Club was informed by Semi Radradra last Wednesday that it was his understanding from family, including his mother, that his father was gravely ill," Eels chief executive Bernie Gurr said via a statement. "In consultation with his legal team and Semi's management, the club granted Semi compassionate leave to return home to Fiji.
"This was granted on the proviso that Semi and his management complied with any requirements from the court.
"The club understands the stress a family illness can provide and at all times we are considerate of the welfare of both Semi and his family.
"On Friday 25 November 2016 the court confirmed that the hearing would proceed on Monday 28 November 2016 and that, subject to the delivery of supporting documentation around the seriousness of the illness of Semi's father, that Semi was obligated to appear in court.
"Our club supported this reasonable position of the court.
"With today's court ruling whereby Semi has been issued with a warrant, suspended until Wednesday 30 November 2016, we continue to work with Semi's manager to ensure Semi is in compliance with all future court requests."