Is it legal to possess 2 US passports? If yes, under what conditions can such a possession be possible or legal?

In some instances, a citizen may request and obtain two U.S. passports. One passport would be the normal 10-year passport. The second is a limited-validity passport, normally valid for 1 or 2 years. Second passports, while often r4eferred to as duplicate passports, are not really "duplicates" as the second passport will have its own issuance and expiration dates and a distinct passport number. Second passports are not favored by the State Department. The are most frequently requested either (1) to obtain a visa for travel to another country, at a time when your passport is in processing in the U.S. to obtain a visa for a different country, or (2) for travel to countries (particularly applicable for the Middle East and Israel) that will not allow entry to someone whose passport bears a stamp from an enemy country. By having a second passport, one can show a different passport when entering each country thereby avoiding having to show a passport bearing a stamp from an enemy country. To obtain a second passport, you will have to submit your most recent U.S. passport. You must have been at least 16 years old when it was issued and your name must be the same now as when it was issued (or you will have to provide evidence of a marriage certificate or court-ordered change of name.) You will also have to submit a statement to the State Department containing a valid reason for needing the second, limited-validity passport, such as those I listed above. All statements and documents are subject to verification. If you willfully and knowingly make a false statement in your passport application, or on the documents submitted with the application, you are subject to being charged with a federal crime that carries a possible prison sentence. It is also a crime to alter or mutilate a passport or to use a second, limited-validity passport in violation of its restrictions or U.S. passport regulations.