Mubasher: The British parliament on Monday decided to seize internal Facebook documents in a move that will likely set the tone for a high-stakes hearing due to take place this week.

Damian Collins, chair of the U.K.'s Digital, Culture, Media and Sport Committee (DCMS), relied on a rare parliamentary power in order to enforce the founder of app-maker Six4Three, Ted Kramer, to give back the documents during a business trip to London, CNBC reported.

The internal documents include confidential emails in relation to Facebook's data and privacy controls in the run-up to the firm's data scandal earlier this year, in addition to emailed correspondence with Facebook chief executive Mark Zuckerberg and other senior executives.

Facebook is preparing itself for a crucial hearing before the DCMS committee in London on Tuesday in the presence of Richard Allen, the company's vice president of policy solutions, as well as political officials from Canada, Ireland, Latvia and Singapore.

Collins stressed that the committee had obtained the documents from Six4Three.

"Six4Three's claims are entirely meritless — Facebook has never traded Facebook data for anything and we've always made clear that developer access is subject to both our policies and what info people choose to share," a Facebook spokesperson told CNBC.