Socino heading back to Argentina
The 27-year-old made 34 first team appearances for the Falcons, of which nine were starts, and leaves with the best wishes of the club.
Director of rugby Dean Richards said: “Santi has ambitions to play international rugby for Argentina and we have agreed to release him so that he can take up this opportunity in his homeland.
“We wish him the best of luck for his move to Jaguares, and hopefully we will see him pushing on and achieving his goal of playing for his country.”