A Belgian court is set to rule on whether Skype is a telecoms service provider in a bid to clear up a case over the handing over of citizens' data.
A report on Reuters said that Skype may face a fine if it is deemed to be a service provider because of its refusal to release personal data to the authorities.
"The judicial question is whether Skype is also a telecoms operator," said the court spokesman.
V3 has asked Microsoft, which has owned Skype since 2011, for its take on the news and is waiting for a response.
This is not the first time that Microsoft has been pushed over Skype, nor is it the first time that it has been questioned about the way in which the communication system uses and deals with data.
A number of rights groups wrote to Microsoft in January 2013 asking about Skype and how it protects its 600 million users.
"[Many] users rely on Skype for secure communications, whether they are activists operating in countries governed by authoritarian regimes, journalists communicating with sensitive sources, or users who wish to talk privately in confidence with business associates, family or friends," said the letter.
"It is unfortunate that these users, and those who advise them on best security practices, work in the face of persistently unclear and confusing statements about the confidentiality of Skype conversations, and in particular the access that governments and other third parties have to Skype user data and communications."
Microsoft capitulated to this request and published Skype-related information in its transparency report that year.
The report said that Skype received 978 government demands relating to 3,507 accounts and complied with all but eight percent of them.
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