A travel permit is a document issued by a government authority that allows a person to travel to a specific destination. There are several synonyms for this term, including passport, visa, travel visa, immigration permit, entry permit, journey document, and travel paper. A passport is an official document that serves as proof of identity and citizenship and is required for international travel. A visa is a permit granted by a foreign government that allows a person to enter and stay in a country for a specific period. An immigration permit and entry permit are both documents that allow a person to legally enter a country. A travel paper and journey document are both terms used to describe any document that a person needs to travel.