<P> While the title generally reflects the ambassador's second head position as head of a diplomatic mission, in some countries the term may also represent a rank held by career diplomats, as a matter of internal promotion, regardless of the posting, and in many national careers it is quite common for them to be appointed to other functions, especially within the ministry / ministries in charge of foreign affairs, in some countries in systematic alternation with actual postings . </P> <P> The formal form of address for an ambassador is generally the form that would be used to address a head of state: "(Your / His / Her) Excellency" followed by name or the country represented . In many countries, less formal variations are frequently used, such as "Ambassador" followed by name, or the name followed by "Ambassador of ...". In the United States, "Mister / Madam Ambassador" may be used . The Republic of Kosovo has bestowed the title of honorary ambassador to nine prominent individuals . This is a rare example of an appointment for life by presidential decree of an ambassador by a sovereign state . Honorary ambassadors are entitled to the same precedence and honors as career ambassadors in the Republic of Kosovo . </P> <P> In some countries, a former ambassador may continue to be styled and addressed as ambassador throughout their life (in the United States, "Mr. Ambassador" or "Madam Ambassador" may be heard). In other countries, ambassador is a title that accrues to its holder only with respect to a specific position, and may not be used after leaving or beyond the position . Some countries do not use the term while an ambassador is in the home country, as the office holder is not an ambassador there; for example, a Canadian ambassador while in Canada is not generally addressed as ambassador, although they may be referred to as "Canadian ambassador to ..."; that is, with reference to a specific job function; the person is addressed or styled as ambassador only while holding such office . </P> <P> In a less formal sense, the phrase is used for high - profile non-diplomatic representatives of various entities (rarely states), mainly cultural and charitable organizations, often as willing figureheads to attract media attention; for example, film and pop stars make appeals to the public at large for UNESCO activities (see UNESCO Goodwill Ambassadors), sometimes during press - swarmed visits in the foreign country . </P>

What is the official title of the person who represents the sovereign at this level