This principality is not recognized by the authorities, this is unusual and bizarre case but it is real.
Claiming that a country is not recognized, is silly, by their OWN rules and teraties...
The Convention on the Rights and Duties of States is an international treaty signed in Montevideo, Uruguay, on December 26, 1933. The convention establishes the definition of the State, its rights and obligations. In Article 1 it establishes four characteristic criteria of a State that have become part of customary international law. They have been recognized as confirmation in International Law, establishing that a State as a person of International Law must meet the following requirements:
ARTICLE 1 The State as a subject of International Law must meet the following requirements:
  • Permanent population.
  • Determined territory.
  • Government.
  • Ability to enter into relations with other States.
Under these guidelines, any entity that meets these criteria can be considered a sovereign state under international law, whether or not it has been recognized by other states.
ARTICLE 3 The political existence of the state is independent of its recognition by other states. Even before being recognized, the State has the right to defend its integrity and independence.
ARTICLE 7 The recognition of the State may be express or tacit. The latter results from any act that implies the intention to recognize the new State. In other words: my body of a living man can be a State, wherever am I, with the "territory" inside my body. If I travel around, I am just a simple ambassador of my own state in that visited state.