You need to take an Immigration lawyer. But be careful. Most lawyers will charge you a lot of many and promise you magic's but at the end will have very poor results.
The Bureau of Citizenship and Immigration Services sets the standards and requirements for citizenship in the U.S.
Apply for citizenship through the Bureau of Immigration.
This task can be completed by going to the United states Immigration Services office located in your city or town. You can locate the address through the websitehttp:/www.www.uscis.gov/ to get to the United States Bureau of Citizenship and Immigration Services.
The department of citizenship and immigration Canada was established in 1994. I checked on Wikipedia!
The United States Citizenship and Immigration Services(USCIS) is responsible for all citizenship, visas, green card etc requirements. The processing is entirely done through them. It is the agency fully responsible for all lawful immigration processes.
Immigration and Naturalization Service
Allan Wernick has written: 'U.S. Immigration & Citizenship' 'U.S. Immigration and Citizenship ; Your Complete Guide'
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Director General - Immigration, Refugees and Citizenship Canada / Immigration, Réfugiés et Citoyenneté Canada
In the Philippines, dual citizenship is allowed under the Dual Citizenship Law (Republic Act No. 9225) for those who were natural-born citizens but lost their citizenship upon acquiring a foreign citizenship. They must apply for retention or re-acquisition of Philippine citizenship, typically through a petition to the Bureau of Immigration. In Canada, dual citizenship is permitted, and there are no specific requirements to maintain it. Canadian citizens can hold citizenship in another country without losing their Canadian citizenship, but they must adhere to the laws and requirements of both countries.
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The Department of Immigration and Citizenship is responsible for managing Australia's immigration levels.