Legalisation is the process of attaching an apostille certificate to a UK document, to confirm that the original ink signature of the UK public official, and/or the original embossed seal/ink stamp of a UK public office, on the document are genuine. In the UK, the Foreign, Commonwealth and Development Office is the sole government entity responsible for issuing apostilles. For other countries it will vary, depending on their rules and regulations. The Foreign, Commonwealth & Development Office was previously called Foreign & Commonwealth Office. The merger was announced by the Prime Minister of the United Kingdom in 2020, announcing the FCO and Department for International Development (DFID) to be one.It is often a requirement by foreign authorities that documents are legalised before they can be used for official purposes in their country.Legalisation does not certify the authenticity of a document or give foreign and commonwealth office approval of its content.The legalisation office is the only competent authority in the UK to provide an apostille service according to the requirements of the Hague Convention of 5 October 1961, and to deliver a legalisation service to those countries not party to the Hague Convention.