Barcelona face charges of corruption over installments made to Jose Maria Enriquez Negreira, a previous VP of the board of trustees, as a trade-off for good refereeing choices.
Uefa is additionally examining the matter.
Barcelona deny any bad behavior and no captures were made during the pursuit in Madrid.
The Spanish Common Watchman looked through the Spanish Specialized Council of Refs (CTA) base camp on Thursday.
The underlying criminal examination was brought by the Barcelona public examiner's office in Spring, with European football's overseeing body Uefa sending off its own examination soon after.
It is claimed that Barcelona paid 8.4m euros (£7.4m) to Negreira and his Dasnil 95 organization.
The installments were at first researched as a component of a duty test into the organization run by Negreira.
Barcelona made installments to the organization totalling a detailed 1.4m euros (£1.2m) somewhere in the range of 2016 and 2018, and paid Negreira around 7m euros (£6.2m) somewhere in the range of 2001 and 2018, the year he left his job with the refs' board.
Barcelona recognized they had paid Dasnil 95, which it depicted as "an outside specialized expert", to gather video investigates arbitrators "determined to supplement the data expected by the instructing staff".
They expressed paying for reports was "an ongoing practice among proficient clubs".
In February 18 of the 19 other La Liga clubs gave an assertion communicating "profound concern".
In July Uefa temporarily cleared Barcelona to play in this season's Bosses Association while its examination is continuous.#barcelona #investigations