(source in french, paywalled: https://www.tdg.ch/geneve/actu-genevoise/enquete-devoile-argent-secret-lexroi-despagne-geneve/story/31925842)
http://archive.is/fnFNs
Investigation uncovers secret money of ex-king of Spain in Geneva
Revelations: Juan Carlos I received $ 100 million in an account at the private bank Mirabaud. Gift or corruption? Prosecutor Yves Bertossa is investigating suspicions of money laundering.
The veil is lifted over the fortune hidden in Geneva by the former King of Spain Juan Carlos I. On August 8, 2008, as his country plunged into the financial crisis, the Spanish sovereign received a sumptuous and secret gift: $ 100 million, paid by the then-king of Saudi Arabia, Abdallah.
Juan Carlos, who had the status of head of state at the time and whose lifestyle was financed by the Spanish taxpayer, was careful not to speak of this amount to his subjects. And even less to transfer it to the Treasury of his country.
Instead, the 100 million was discreetly deposited into an account opened at the private Mirabaud bank in the name of the Lucum foundation, a Panamanian entity of which Juan Carlos I was the sole beneficiary. For several years, he withdrew money from this account, then in 2012, most of the remaining amount, some 65 million euros, was given to the former mistress who became "friend at heart" of king, princess Corinna zu Sayn-Wittgenstein. The money was placed in the branch of another Geneva bank in the Bahamas.
These transactions, which have remained unknown to the public until today, are the subject of a criminal investigation in Geneva for "suspicions of aggravated money laundering". Opened in 2018, it was entrusted to the first prosecutor Yves Bertossa, responsible for the complex cases section. This was confirmed by several sources close to the file at the "Tribune de Genève".