Canada's Privacy Commissioner Jennifer Stoddart has sent an open letter to Google Chief Executive Eric Schmidt.
The letter raises concerns about privacy issues surrounding social network tool Google Buzz and Google Street View. It calls for Google to adhere to a set of "fundamental privacy principles" when creating new services in future. Ms Stoddart's counterparts in nine other countries, including the UK, France and Germany, have signed it too.
Ms Stoddart expressed concern that "the privacy rights of the world's citizens are being forgotten as Google rolls out new technological applications."