Avon has devised a rating system that takes account of small indices of permanence and responsibility, such as a mobile phone number or a formal address.

ECONOMIST: Avon in South Africa: Cosmetic difference | The

Due to the magnitude of the youth violence phenomenon in Central America, the Heads of State of El Salvador, Honduras, Guatemala and Nicaragua made a formal appeal for technical assistance to address the issue.

UNESCO: Social and Human Sciences

Prime Minister David Cameron led the debate on 7 March 2012 proposing "an humble address" - a formal communication from Parliament to the Queen - to celebrate 60 years of her reign.

BBC: MPs pay tribute to Queen's 60 years

We sincerely hope that the United States government will address this issue by carrying out a formal investigation of any doubts it may have about Huawei in an effort to reach a clear and accurate conclusion.

FORBES: Huawei's Open Letter To U.S. Investigators