He felt he was being treated unfairly by Spain's tax authorities and his Portuguese team-mates were the first to know of his decision. But tax authorities later found that some of the information presented in that settlement was incorrect, the prosecutors said. Other Mendes charges being investigated for alleged tax evasion while playing in La Liga include Ricardo Carvalho, Ángel Di Maria and Radamel Falcao.
The prosecutor said Ronaldo used shell company in the Virgin Islands to cheat on his taxes.
The "Cristiano Ronaldo is desperate to leave Real Madrid" story was fun while it lasted.
Ronaldo, 32, has been playing for Real Madrid since 2009 while Mourinho, 54, was a coach for Real Madrid from 2010-13.
Ronaldo is now strongly reconsidering an exit from the Santiago Bernabeu and will meet with Perez face-to-face to discuss the matter when he returns to Spain.
However, allegations of tax fraud - denied by the forward - have brought Ronaldo's future into question and United have been heavily linked with a swoop for their former star.
Speaking on Spanish radio station Onda Cero on Monday night, Real Madrid president Florentino Perez said nobody at the club was anticipating Ronaldo leaving this summer. We have not received any offer for Cristiano, nor for [Álvaro] Morata [the striker wanted by United] or James [Rodríguez].
The transfer market has been hit with a trigger following Ronaldo's hint that he could leave Spain if he is eventually hammered in the tax case. However, recent assurances from Real president Perez has also given his backing to the Portuguese frontman.
But Perez rejected those claims.
'Nobody wants him to go, ' said Perez. "But something really weird would have to happen if he were to leave this club".