In this letter, REDRESS and other international and Syrian NGOs call on the European Commission to begin infringement proceedings to determine whether Italy breached EU law by allowing a suspected Syrian war criminal, Ali Mamluk, Head of Syria’s National Security Bureau, to visit the country earlier in 2018. The EU has issued travel and financial restrictions against Ali Mamluk as early as 9 May 2011 because of his involvement in violence against demonstrators in Syria and a European Parliament resolution in March 2018 declared his visit to Italy to be a ‘flagrant violation’ of the EU decision. The NGOs letter is written in support of a complaint submitted to the European Commission by the European Center for Constitutional and Human Rights (ECCHR).