Ronaldo, 32, said to have vowed that he would never play for Real Madrid again, was ordered to appear in a Madrid court on July 31 to answer four counts of tax evasion of 14.7 million euro ($16.5m).
Spain's Budget Minister
Urged media to respect the presumption of innocence regarding the four-time world player of the year.
"What is very important for me is to insist that no one is a criminal if he is not convicted," Montoro told a press conference.
Also Read
Unhappy Ronaldo has left his future at the Spanish giants in doubt after angrily announcing last week that his "conscience is clear."
Spanish tax authorities are also targeting Jose Mourinho, the Manchester United manager who was on Tuesday accused of evading 3.3 million euro ($3.7 million) in tax during his stay at Real Madrid.
Montoro said, however, that sports stars must be "exemplary" and "particularly scrupulous in the fulfilment of their tax obligations" because their actions "radiate over the whole society, for example on youth, children".
And he has also complained on multiple occasions in the past about Real supporters, who have resorted at times to jeering and booing his performance on the pitch.
However club president Florentino Perez disclosed that no offers had been received by Real to tempt Ronaldo away and the club was determined to keep him.
"Ronaldo is a Real player and will continue to be so as far as we are concerned," Perez told Marca sports daily Tuesday. "No offer has been received for him."
- Really bizarre -
==================
However, Perez said that he had not spoken to Ronaldo, who is on duty for Portugal at the Confederations Cup in Russia, which ends on July 2.
He also confirmed that Ronaldo's contract was ring-fenced by a one billion euro release clause.
"I have not spoken with him. We don't want to disturb his concentration with the national team," said Perez.
"But something really bizarre would have to happen if he were to leave this club."
He said that Ronaldo had clearly done nothing wrong and Perez was appalled that the "presumption of innocence is not respected" by the media who have branded the played a delinquent.
As for Mourinho, Manchester United 54-year-old Portuguese coach, he stands accused of two counts of tax fraud while he coached Real Madrid from 2010 to 2013.
Perez, a 70-year-old construction magnate said to be close to Ronaldo, was elected unopposed Monday for a third term in charge of Europe's most successful club.
Perez has dismissed speculation that Ronaldo is trying to put pressure on Real so that they will bear some of the burden of an eventual fine for tax evasion as Barcelona did for Lionel Messi.
Manchester United have so far made no comment on reports they are interested in buying back the player for an estimated 200 million euros, on top of the release fee.
Since extending his contract in November until 2021, Ronaldo is according to Forbes the highest paid sports star in the world with $93 million (83m euro) in 2016-2017.
Disclaimer: No Business Standard Journalist was involved in creation of this content