A national passport is an official document issued by a country's government that certifies a person's identity and nationality. It allows individuals to travel internationally and serves as proof of citizenship. Passports typically include personal information such as the holder's name, date of birth, and photograph, along with security features to prevent forgery. When traveling abroad, a national passport is often required for entry into other countries. It may also be necessary to obtain a visa, which is an endorsement allowing entry for a specific purpose. Each country has its own passport regulations and application processes, which can vary widely.