A judge in Spain has opened an investigation into Princess Cristina's tax returns.
In a judicial writ made public on Friday, examining magistrate Jose Castro said he has asked the tax agency for information to determine whether Cristina, the younger daughter of King Juan Carlos, engaged in tax evasion or money laundering between 2007 and 2010.
An earlier charge of being an accomplice in an embezzlement case was dropped for lack of evidence.
Her husband, Inaki Urdangarin, is charged with fraud, tax evasion, falsifying documents and embezzling six million euros in public funds as head of the Noos Foundation.
Mr Urdangarin, a former Olympic handball player, denies any wrongdoing.
Judge Castro is also presiding over the investigation into Mr Urdangarin and his former business partner, Diego Torres.
The BBC reports Princess Cristina was summoned to appear in court on 27 April over suspected complicity in the embezzlement charge but the subpoena was later dropped for lack of evidence.