Barcelona have told Paris St-Germain
The Brazil international arrived at training on Wednesday with his father and representative, and told the Spanish club he wanted to leave.
He was then given permission by Barca manager Ernesto Valverde not to train and to "sort out his future".
PSG are understood to be ready to pay the 25-year-old's release clause.
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The latest development comes two days after it emerged Barca were ready to push for a Financial Fair Play investigation if PSG signed Neymar
That came after La Liga president Javier Tebas threatened, in an interview with Mundo Deportivo, a legal response against the former Ligue 1 champions if European football's governing body failed to take action.
