I have lived in America all my life and was born here as well. Recently I decided that I should give a try at life in Portugal however I'm not sure if I have every document needed. I am an american citizen and also a portuguese citizen. I have my cartao de cidadao but don't have a portuguese passport. I do have an american passport though. Do I need a portuguese passport? Do I need any other document or have to do anything else? I'm scared that when I get to the portuguese airport they won't let enter since I don't have a portuguese passport but like I said i do have my cartao de cidadao.