Walter Hinteler wrote:
Another question wpuld be: does the country, where you live now. allow dual citizenship.
Most developed countries such as US, UK, Australia, Switzerland have no restrictions on holding dual nationality.
Dual citizenship had previously been banned in the United States, but in 1967 the US Supreme Court struck down most laws forbidding dual citizenship.
However, the US government remained disdainful of dual citizenship for some time. To this day, candidates for US citizenship through naturalization are forced to renounce their previous citizenship at the United States naturalization ceremony. This renunciation may well not be recognized by the candidate's country of origin, resulting in no loss, in that country's eyes, of the first citizenship.
US citizens by birth who become aware of existing citizenship of another country, e.g. by parentage or ancestry, or who live in another country and qualify for naturalization in that other country, face no bar to dual citizenship, and do not need to seek permission from the US Government before ratifying that citizenship e.g. by obtaining a passport or undergoing naturalization.
US citizens who hold dual or multiple nationality are required to use their US passports when entering or leaving the US, and usually when entering or leaving another country where citizenship is held, use of the passport of that country is required.
(I have a cousin who has triple citizenship, Canada, USA, and UK. Many people have more than that.)
Countries that either forbid or restrict dual citizenship:
Andorra, Austria, Azerbaijan ,Burma, Bahrain, Botswana, Japan, China ,Czech Republic, Denmark, Fiji,India,Indonesia, Ecuador, Estonia, Iran, Poland, Papua New Guinea, Brunei, Japan, Peru, Kuwait , Kenya, Kazakhstan, Chile, Kiribati, Poland, Korea, Kuwait, Denmark, Latvia,Singapore, Slovakia, Ecuador, Lithuania, Solomon Islands ,Fiji ,Malaysia, Mauritius, Netherlands, United Arab Emirates (UAE), Romania, Thailand, Mexico, Nepal, Venezuela, Norway, Zimbabwe, Mauritius, Myanmar, Nepal
Pakistan allows dual citizenship only with the below countries
Allows dual citizenship with some Latin-American countries Argentina, Bolivia, Chile, Colombia, Costa Rica, the Dominican Republic, Ecuador, Guatemala, Honduras, Nicaragua, Paraguay, Peru and Uruguay, Andorra, Portugal, the Philippines and Equatorial Guinea.