The Observer reported that the files, which it said include correspondence from Facebook CEO Mark Zuckerberg, were seized from the founder of a US software company, Six4Three, which is engaged in legal action against the tech giant. Furthermore, The Observer reported that, "they include confidential emails between senior executives, and correspondence with [Mark] Zuckerberg." .
The parliament's Digital, Culture, Media and Sport Committee has "received the documents it ordered from Six4Three relating to Facebook", Committee Chairman Damian Collins tweeted on Sunday. A sergeant at arms was sent to the individual's hotel and gave him a two-hour deadline to hand over the documents.
Apparently, the company Six4Three is involved in a legal case against Facebook in the US, where the documents were obtained through legal procedures.
The app maker, Six4Three, had acquired the files as part of a lawsuit against the social media giant.
He criticised Facebook's lack of cooperation with his committee, and said the "documents contained answers to some of the questions we have been seeking about the use of data, especially by external developers".
"It makes it look like he's got something to hide and he's anxious that we may have information and questions we could put to him that would put him in a hard position", Collins said.
Collins said: "We have very serious questions for Facebook".
Facebook told the Observer: "The materials gotten by the DCMS board of trustees are liable to a defensive request of the San Mateo Superior Court limiting their revelation".
Facebook has appealed against the fine, claiming that the watchdog found no evidence that United Kingdom users' personal data had been shared inappropriately and the penalty was therefore unjustified.
"We allege that Facebook itself is the biggest violator of data misuse in the history of the software industry", Ted Kramer, the owner of Six4Three, the company suing Facebook, told CNN in an interview this summer.
"An unprecedented global grand committee comprising 22 representatives from seven parliaments will meet in London next week to put questions to Facebook about the online fake news crisis and the social network's own string of data misuse scandals", TechCrunch reported on Friday.
"We are also interested to know whether the policies of Facebook, as expressed within these documents, are consistent with the public statements the company has made on the same issues". "We have no further comment".