Spain's hard-left Podemos party had called for the enquiry but an executive body “did not accept the request for an investigation commission to be created,” a parliament source said.
A week ago, the daily Tribune de Geneve reported that in 2008, Juan Carlos had received $100 million (88 million euros) from Saudi king Abdallah via the Swiss account of an entity listed in Panama.
The newspaper added that in 2012, $65 million of that sum was given by the king to his former mistress, Corinna zu Sayn-Wittgenstein.
It quoted sources close to the matter as saying that the transactions are at the centre of an investigation opened in 2018 in Geneva for “suspected aggravated money laundering.”
The Geneva prosecutor has not responded to requests by AFP for information on the matter.
Juan Carlos, 82, lost his immunity from prosecution after handing power to his son, Felipe, in June 2014 following a 39-year reign. He resigned from public life last year.
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