In this May 4, 2019 file photo, Spain's former king Juan Carlos leaves the Notre Dame cathedral after attending at the funeral of the Grand Duke Jean of Luxembourg, in Luxembourg. (FRANCISCO SECO / AP)

MADRID - Spain’s former king Juan Carlos, who left his homeland under a cloud of scandal in August, has settled a back tax bill worth more than 678,000 euros (US$817,871) including interest and fines, his lawyers said on Wednesday.

The lawyers, in a statement, provided no details on what the back taxes were for. But the newspaper El Pais reported earlier the former monarch sought to settle certain alleged illegal credit card transactions with the revenue service to avoid being charged in an investigation and to be able to return to Spain.

Juan Carlos has been living in United Arab Emirates since he left Spain in August

“In any case, His Majesty King Juan Carlos remains, as always, at the Tax Service’s disposal for any procedure it considers necessary,” the lawyers said.

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Prosecutors at Spain’s Supreme Court have opened several investigations into Juan Carlos’ business dealings, including those linked to a high-speed train contract in Saudi Arabia.

Juan Carlos’ son, King Felipe, is the current head of state.

“The monarchy is not in danger,” Prime Minister Pedro Sanchez told TV channel Telecinco in an interview, when asked about the scandals involving Juan Carlos, whose formal title is the King Emeritus.

Sanchez defended the system of Spain’s constitutional monarchy and called for respect for the “presumption of innocence” in the face of judicial investigations of the former monarch.

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Juan Carlos has been living in United Arab Emirates since he left Spain.

Through his lawyers, he has repeatedly declined to comment on corruption allegations. Spanish monarchs have immunity during their reign but Juan Carlos’ abdication in 2014 in favor of his son potentially leaves him vulnerable to prosecution.