Former Catalan Education Minister Clara Ponsati, who has been hiding from Spanish law enforcement in the United Kingdom, said Wednesday that she was going to surrender to UK authorities.
Spanish authorities accuse her of "violent rebellion and misappropriation of public funds" over her role in Catalonia's independence referendum a year ago, but she refutes the claims.
He led the parliamentary session that saw separatist lawmakers vote for the region of Catalonia to declare independence from Spain.
But she arrived in Scotland in March and has said she will fight any attempt to return her to Spain.
"She submits that Spain has not followed due process and can not guarantee the independence of the judiciary and has repeatedly abused the human rights of the Catalan people".
"The last few days have been hard, and Clara knows that there is a long road ahead, but she is truly humbled by the hundreds of thousands who have supported her [and] contributed to the legal fund, and also wishes to thank the Scottish Government".
The academic, who had been the Catalan education minister, is now being detained and will appear from custody at an initial extradition hearing at Edinburgh Sheriff Court later on Wednesday.
Anwar continued: "Clara wishes for me to state that these charges are a politically motivated, and a grotesque distortion of the truth".More news: CNN Poll: 42% approve of Trump, highest in 11 months
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Her lawyer Aamer Anwar said he was preparing her for a court appearance today where she intends to fight extradition. She can not believe that she is being held responsible for the violence that took place on the day of the referendum. A hearing has been set for the 12 of April.
A pro-independence Catalan politician who is being sought by the Spanish government has handed herself in to Scottish police. A Spanish justice ministry official was not available to comment on the latest development.
The former education minister is wanted by Madrid on charges relating to her role in October's independence referendum.
The political crisis is one of Spain's most serious since the country returned to democracy in the 1970s.
He was travelling from Denmark to Belgium where he has been living in self-imposed exile since last October.
She added: "The fact that our justice system is legally obliged to follow due process in the determination of extradition requests does not change those views".
Wolfgang Schomburg, a German attorney representing Puigdemont, urged the Berlin German government to immediately make clear it would not under any circumstances approve his extradition.
Spain's Supreme Court said it would prosecute 13 key separatists including Puigdemont and Ponsati for "rebellion", a crime which carries a maximum penalty of 30 years in jail.