Analysis of information sources in references of the Wikipedia article "Prank call" in English language version.
In 1995, Canadian DJ Pierre Brassard got through to Buckingham Palace pretending to be Canadian Prime Minister Jean Chrétien. He chatted to the Queen for 15 minutes on air – eliciting a promise that she would try to influence Quebec's referendum on proposals to break away from Canada – and she never realised it was a hoax.
A radio station in the American state of Florida Hasplayed a practical joke on President Hugo Chavez of Venezuela with a hoax phone call he believed was from his friend and ally, the Cuban leader Fidel Castro. Two presenters at Radio El Zol, in Miami, called Mr. Chavez on a private line and used taped extracts of Mr Castro's voice to make him think it was the communist leader himself on the phone.