O One of the causes of loss of indonesian citizenship according to article 23 of law number 12 of 2006 concerning citizenship of the republic of indonesia is having a passport from another country. paulus tannos is an indonesian citizen who holds a passport from another country, namely guinea-bissau. the problem in this research is how to own a dual passport in the name of paulus tannos and what are the legal consequences of owning a passport from another country in the name of paulus tannos. to answer this problem, a normative research was conducted using secondary data, namely laws and regulations. this research is descriptive analysis, the analysis of which uses qualitative methods and the drawing of conclusions in this study uses deductive methods. the conclusion of this research is that the ownership of a dual passport was known to the representative of the republic of indonesia in chicago when paulus tannos applied for renunciation of citizenship. paulus tannos obtained a guinea-bissau passport after being named a suspect in the e-ktp project case. ownership of a dual passport has fulfilled the requirements for loss of indonesian citizenship. legally, the loss of citizenship status will be followed by the revocation of the passport. however, paulus tannos still has the status of an indonesian citizen because he has not completed the procedure for renunciation of his citizenship.