Passport must have enough blank pages to accommodate entry and exit immigration stamps for each country of travel. A blank passport page is a clean and clear page, which does not show ink or stains from any other pages in the passport. Passports must typically have 2-4 blank pages for international travel. The airline may not let you board or your destination country may not let you enter if there is no space for the entrance stamp/visa to be stamped into your passport. At least 1 blank page in a passport is required for each visa. Most visas that are stamped in a passport require an entire blank passport page. Each country has different entry requirements for the number of blank pages required. Make sure to check with your destination country’s government website before starting your journey.