Passport books are used in the United States to verify citizenship and the right to re-enter one's home country, such as the United States of America. Passports are non-transferable identification documents issued by the State Department of the United States for the purpose of travel and identification.

In the United States, the State Department issues various passport books and re-entry documents depending on the situation. Individuals must use regular passports for personal travel and special passports for specific application purposes in all cases.

Passports in Regular Form:

These blue passport books are valid for personal international travel for 10 years for adults and 5 years for minors. These passport books are issued to US citizens who require a passport for identification or to travel to an international destination.

Passport from the Government:

These red books, also known as no-fee passport books, allow military officers and government employees to travel internationally only while performing official duties. The forms are provided by the individual's governing office.

Immediate family members of deceased U.S. military personnel can obtain red books with a letter from the American Battle Monuments Commission and use them only once for visiting the same person's overseas gravesite or memorial.

Diplomatic Identification Card:

These black no-fee books notify airport personnel that these travellers have diplomatic immunity, which means they may not search, delay, detain, or arrest them. Diplomats are only permitted to use it while on active duty.

Emergency passport:

Travelers who have lost their United States passports due to disaster, carelessness, or theft can obtain emergency regular passports from the United States Consulate or Embassy in the country of travel

Issuance necessitates a new passport application as well as proof of identity via personal information, in-country witnesses, family and friends in the United States, and previously issued passport confirmation.