Ten days after Muscats election in 2013 Tonna founded via Mossack Fonseca in Panama the "Willerby Trade Inc.." In July 2013 employees of Tonna created at least three letterbox firms in Panama: "Tillgate Inc." owned by prime minister's chief of staff Keith Schembri, Hearnville Inc. owned by Energy-minister Konrad Mizzi and "Egrant Inc.".