Call centre workers in Norway are protesting against a hi-tech surveillance system that triggers an alarm if they spend more than eight minutes per day in the lavatory.
Managers are alerted by flashing lights if an employee is away from their desk for a loo break or other "personal activities" beyond the allotted time.
But unions and workplace inspectors have branded the practice at insurance company DNB as "highly intrusive" and a potential breach of their human rights.
Norway's privacy regulator called Datatilsynet has now written to DNB telling them the monitoring system is "a major violation of privacy".
It said: "Each individual worker has different needs and these kinds of strict controls deprive the employees of all freedoms over the course of their working day."
The employees union Finansforbundet described the rules as unacceptable.
A spokesman added: "Surveying staff to limit lavatory visits, cigarette breaks, personal phone calls and other personal needs to a total of eight minutes per day is highly restrictive and intrusive and must be stopped."
The firm said the aim of the checks was not to measure the breaks taken by individual workers but to assess staffing needs to ensure all calls from customers were answered and it would now be reviewing the policy.
It is the latest example of lavatory rules in Norwegian companies.
Last year the country's workplace ombudsman said one firm was reported for making women workers wear a red bracelet when they were having their period to justify more frequent trips to the loo.
Another company made staff sign a lavatory "visitors book" while a third issued employees with an electronic key card to gain access to the lavatories so they could monitor breaks.
We all are made to believe that Scandinavia is this utopian world where everyone is happy and contented. Apparently not true. It's like working for Big Brother over there. The only place you can escape from your boss for a few minutes during the day and now the man wants to monitor and restrict your loo time. So whats next cameras in the washrooms?source