Petition the United Nations

When asked on how to petition the United Nations I received this reply:

Greetings from the Public Inquiries Team.

With regard to your query, please note that there are no specific protocols when sending a petition to the UN.
The petition should state your concerns clearly that's all. You can send it to us via postal mail at 
Public Inquiries Unit, Department of Public Information, United Nations, Room: GA-1B-31, New York, NY 10017.

We hope this information is useful to you, and thank you for taking the initiative to write to us.

Best regards,

Public Inquiries, Visitors Services
Department of Public Information
United Nations Headquarters
Website: http://visit.un.org

What happens next is the next query.