What have you read and who did you ask? The general rule [0][1] is that you cannot keep your existing citizenship, with certain exceptions to that rule specifie

What have you read and who did you ask? The general rule [0][1] is that you cannot keep your existing citizenship, with certain exceptions to that rule specified by law [2]. I don't see any that apply to the US, though, most of them deal with situations where you want to, but for various reasons can't, give up your previous citizenship. It's possible that there's a separate treaty with the US (as permitted in § 12 (3)), but I couldn't find any. IANAL. [0] http://www.gesetze-im-internet.de/rustag/__10.html http://www.gesetze-im-internet.de/rustag/__10.html [1] https://en.wikipedia.org/wiki/German_nationality_law#Naturalisation_as_a_German_citizen https://en.wikipedia.org/wiki/German_nationality_law#Natural... [2] http://www.gesetze-im-internet.de/rustag/__12.html http://www.gesetze-im-internet.de/rustag/__12.html