Ten privacy commissioners from countries including Germany, Canada, and the U.K. have sent a letter to Google CEO Eric Schmidt saying the company "failed to take adequate account of privacy considerations" when launching Google Buzz.

Monday's letter doesn't threaten the Mountain View, Calif.-based company with any formal or informal legal action. Instead, it asks for a response outlining how Google "will ensure that privacy and data protection requirements" are met in the future.

Also signing the letter were privacy commissioners from France, Ireland, Israel, Italy, the Netherlands, New Zealand, and Spain. Jon Leibowitz, the chairman of the Federal Trade Commission, which serves a similar role in the United States, did not sign.

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