She is alleged to be involved in Panama-based letterbox companies in a network of political-business connections of her husband.
[2][3][4] After Muscat's election in 2013, employees of Brian Tonna created the letterbox company Egrant Inc. in Panama.
In April 2017, journalist Daphne Caruana Galizia suggested that shares in Egrant Inc. were held by Mossack Fonseca nominees for Michelle Muscat.
In December 2019, an inquiry was published, which investigated if the Panama company Egrant Inc. was owned by the prime minister, his wife or his family.
The investigation found no evidence to support the claim made by Caruana Galizia.