Barca were responding to media reports in Spain on Wednesday regarding allegations of unpaid tax relating to the signing of Neymar, who moved to the Nou Camp from Santos last June.
The statement read: "In light of reports appearing in today's press concerning the transfer process carried out to bring Neymar da Silva Santos Junior to the Club, FC Barcelona would like to state:
"1) The Club's dealings with respect to this operation, and in light of all information available, was at all times in line with the relevant legal legislation
"2) Represented by its lawyers, the Club will appear at the Jutjat Central d'Instruccio number 5 within the next few days in order to defend its interests and rights.
"3) We express our total willingness to collaborate with the Justice authorities in this matter, as we have done since the first moment the issue arose and in any other area in which our presence may be required."
Barca have found themselves embroiled in controversy regarding the finances behind Neymar's move to the Nou Camp.
Last month Sandro Rosell resigned as club president in the wake of Spanish national court judge Pablo Ruz accepting a lawsuit that alleged Rosell misappropriated funds from the transfer of Brazil international - something the 49-year-old described as ''unfair and reckless''.
Barca club member Jordi Cases alleged that the amount paid was more than the 57 million euro (£48.6m) fee reported at the time.