The ministry also said that “following the Exchange of Tax Information Accord signed by Portugal and Switzerland in 2012, the tax authority today has precise information about bank accounts” in that country belonging to Portuguese tax payers.


The investigation, known as "Swissleaks", revealed documents provided by a computer engineer, Hervé Falciani, who used to work at HSBC in Geneva to the French government in 2008, which led to an investigation.


The information that was disclosed also said that the largest amount of money belonging to a client connected with Portugal is $161.8 million (€142.9 million), but the account holder’s identity was not revealed.