The singer sought the order to ban photographers if they follow her or approach her within 100 meters (yards) of her home, according to the source, who spoke on condition of anonymity because he was not directly involved in the case.
Winehouse posted the anti-harrassment injunction outside her home.
The 25-year-old's drug problems have been front page news in Britain, where she was pictured puffing on what appeared to be a crack pipe last year.
Winehouse sought the injunction last month after moving from the north London neighborhood of Camden - known for its music scene and drug culture - to the more sleepy Hadley Wood area of Enfield, further north.
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