This document discusses various documents that may be required for travel, including passports, visas, entry permits, health certificates, and tax clearance certificates. It provides details on the purpose and information contained in each document. A passport provides identification and proof of citizenship and is required to travel internationally. A visa allows a traveler to enter, leave or stay in a foreign country for a specified time period. An entry permit approves a traveler's application to reside, work or study in a country. Some countries require health certificates showing vaccinations. A tax clearance certificate confirms a traveler has no tax liabilities in their home country.