In a statement, Gestifute said: "Cristiano Ronaldo signed for Real Madrid in 2009 under the Law of Impatriots, legislation in force and prevailing then, and he was taxed only for the incomes that were attributable to Spain".
Additionally, the prosecutor also accused Ronaldo of declaring €11.5m ($12.8m) earned in 2011-14 in a tax return filed in 2014, when the prosecutor said Ronaldo's real income during that period was nearly €43m ($48m).
LISBON, Portugal (AP) - Cristiano Ronaldo appeared to be unconcerned despite being accused by a Spanish state prosecutor of defrauding the government of millions of euros (dollars) in unpaid taxes.
"Real Madrid C.F are absolutely convinced that our player, Cristiano Ronaldo, will prove his total innocence in this process".
The world's highest-paid athlete is the latest target of tax authorities who have probed a number of other high profile footballers including FC Barcelona forward Lionel Messi who was sentenced previous year to 21 months in prison for tax evasion.
Prosecutors alleged that Ronaldo had defrauded the tax authorities of €1.4m in 2011, €1.7m in 2012, €3.2m in 2013 and €8.5m in 2014.
The statement, released via his representatives, was in response to a tax fraud lawsuit being filed against the 32-year-old Real Madrid star on Tuesday. The four counts of tax fraud were based on a report from Spain's tax agency, it said in a statement.
"Ceding image rights to (Tollin Associates) was completely unnecessary and its only goal was to create a screen to hide the totality of his image rights income from the Spanish tax authorities", the statement said.
And finally, they accuse him of "voluntarily" refusing to include 28.4 million euros in income linked to the sale of his image rights for the 2015 to 2020 period to a Spanish company.
The issue started in December 2008, when he ceded his image rights to the company Tollin Associates Ltd, with address in the Virgin Islands, a tax haven country.
Do you think Ronaldo will eventually be acquitted of any charges?