Questionnaires were sent out to news publishers by the EU Competition authorities, as part of an ongoing preliminary probe into Google’s use of reader’s data and how the tech giant leverages data to personalise advertisements.

EU Commission said earlier this month that its probe relates to areas including local search services, online advertising, online ad targeting services, login services and web browsers.

The questionnaire asks publishers to give the scope, duration and rationale for their deals with Google and to detail whether the latter provides any technical support or compensation in exchange for the data, or if the information is re-sold to third parties, giving advertisers the same information that publishers have about their readers, according to the FT.

Respondents have until January 15 to submit their answers.

According to EU Commission, the probe is on-going, as the EU “is not yet done with scrutinising Google” and may lead to to the Commission opening new cases against the U.S. tech firm and to stricter rules on the way tech giants use other companies’ data.

Margrethe Vestager, EU’s new chief in Big Tech had made her plans clear when it comes to dealing with the world’s digital giants and the way these operate across the 28-country bloc.

The new Commissioner for “a Europe fit for the digital age” announced the Commission’s plan to probe the tech companies during November’s European Publication, after France raised concerns regarding Google.

It is not the first time that the EU’s competition authority looks into companies’ compliance with the new copyright rules, as in July, the EU Commission opened a formal investigation into Amazon to assess the e-retailer’s compliance with GDPR when it comes to independent retailers’ data.

Publishers have long complained about Google’s collection of data, use of advertisements and the way their content and images are shown in the Google search results and the U.S. tech giant has already been requested to pay more than € 8 billion of fines.