Gwen Stefani's dad has been granted a restraining order against an obsessed fan who he claims keeps following his daughter.

According to gossip website TMZ, Dennis Stefani got the green light for a protection order after he filed documents claiming fan Richard Portnoy visited his house and then read him a letter about his feelings towards the 45-year-old singer.

Dennis also claims in the papers that Portnoy has gained access to information about where his daughter has medical treatments and attempted to contact her on March 16, and has also been to both his and Gwen's house three times since February.

The restraining order means Portnoy isn't allowed any contact with Gwen, her husband Gavin Rossdale and their three children, Kingston, eight, Zuma, six, and 12-month-old Apollo, as well as Dennis and his wife Patricia, and must stay 100 yards away from the family.

Dennis filed the documents because he and Patricia were worried Portnoy might turn up at their home, or Gwen's, again.

Earlier this month, it was reported Gwen called the police because she thought someone had followed her to an acupuncture clinic in Los Angeles.

Police officers arrived and started searching nearby shops but didn't find anyone.