refugees who would wish to renounce allegiance to the country from which they escaped. The Universal Declaration of Human Rights lists both the right to leave any country, including one's own (Article 13(2)), and the right to change one's nationality (Article 15(2)), which implicitly recognizes the right to renounce citizenship. Renunciation law in specific countries Each country sets its own policies for formal renunciation of citizenship. There is a common concern that individuals about to relinquish their citizenship do not become a stateless person, and many countries require evidence of another citizenship or an official promise to grant citizenship before they release that person from citizenship. Some countries may not allow or do not recognize renunciation of citizenship or establish administrative procedures that are essentially impossible to complete. Renunciation of citizenship is most straightforward in those countries which recognize and strictly enforce a single citizenship. Thus, voluntary naturalization in another country is considered as "giving up" of one's previous citizenship or implicit renunciation. For practical reasons, such an automatic renunciation cannot officially take place until the authorities of the original country are informed about the naturalization. UN Signatories Due to the United Nations Convention on the Reduction of Statelessness, renunciation in Canada and Australia is possible only if it will not result in statelessness. Applications for renunciation may have a waiting time of several months until approval. Argentina Argentina is one of the few countries in the world where its citizens cannot renounce their citizenship. According to Art. 75- section 12 of the Argentine Constitution, Art. 16 of Decree 3213/84 and judicial interpretation of the Supreme Court, the Argentine nationality is irrevocable. Argentinians seeking citizenships in countries where multiple nationalities is prohibited can contact their Consulates to obtain proof of the irrevocability of Argentine nationality. Germany Germany actively investigates whether its citizens living abroad have become naturalized when they apply for a passport; for instance in Canada, German passport applicants have to submit a search of citizenship record. Israel Israel allows dual citizenship upon naturalization through the Law of Return, but Knesset (Israeli parliament) members are required to renounce all foreign citizenships. Japan In accordance with Japanese nationality law, the renouncing person is required to submit a formal report at an embassy. Mexico Mexico requires renunciation of all other citizenships as a condition of naturalization. Nigeria The right to renounce Nigerian citizenship is established in May 29 of the 1999