Facebook has lost its bid to collect the personal data of WhatsApp users in Germany -- for now.
The idea was to improve Facebook's ad targeting and to make it easier for the social network to suggest friend connections.
With some careful scrolling through the new terms, WhatsApp users were able to opt out of allowing Facebook to use their data for these purposes. However, they could not stop Facebook from transferring their WhatsApp data to the mothership in the first place.
The following month, the Hamburg data-protection authority ordered Facebook to immediately stop importing WhatsApp users' data in the country, and to delete the data it had already imported.
Hamburg data-protection commissioner Johannes Caspar said Facebook had not asked for nor received users' genuine consent for the data transfers. The social network appealed to the courts, and on Tuesday it suffered a serious setback.
Facebook wanted the Hamburg administrative court to suspend the privacy regulator's order while the case, which will need to decide jurisdictional issues, runs its course. The court largely refused to do so, for now. WhatsApp may not transfer the data of its 35 million German users to Facebook.
"This is good news for the many millions of people who use the WhatsApp messenger service in Germany every day," said Caspar in a statement. "They are not defenceless."
Facebook told ZDNet it intends to appeal this part of the court's ruling. The company said it has paused the use of WhatsApp users' data across Europe, while it discusses the matter with regulators.
However, there was another element to Tuesday's decision that went in Facebook's favour: Caspar had also ordered the social media company to immediately delete the data of German WhatsApp users that it had already imported, but the court decided that Facebook could hold off doing so for now.
In a separate case, Germany's consumer watchdogs in January sued Facebook over the data transfers, this time in Berlin. The associations' umbrella body, the VZBV, had issued a cease-and-desist order around the same time that Caspar made his order, but Facebook had refused to comply.