<P> In diplomacy, a persona non grata (Latin: "person not appreciated", plural: personae non gratae) is a foreign person whose entering or remaining in a particular country is prohibited by that country's government . Being so named is the most serious form of censure which a country can apply to foreign diplomats, who are otherwise protected by diplomatic immunity from arrest and other normal kinds of prosecution . </P> <P> Under Article 9 of the Vienna Convention on Diplomatic Relations, a receiving state may "at any time and without having to explain its decision" declare any member of a diplomatic staff persona non grata . A person so declared is considered unacceptable and is usually recalled to his or her home nation . If not recalled, the receiving state "may refuse to recognize the person concerned as a member of the mission". </P>

What does the latin phrase persona non grata mean