In the travel landscape of 2026, a physical hard copy of an e-ticket is rarely a strict requirement, but it remains a highly recommended backup for several reasons. Most airlines, train operators, and event venues now utilize digital QR codes or barcodes that can be scanned directly from a smartphone or via apps like Apple Wallet and Google Wallet. However, relying solely on a mobile device can be risky if your battery dies, your screen is cracked, or you lose internet connectivity in a foreign country. Furthermore, many international immigration officers still prefer—or in some cases require—to see a physical "Proof of Onward Travel" before allowing entry into a country. If you are traveling to regions with less developed digital infrastructure or through airports with older scanning technology, a printed copy can save significant time. Having a paper backup also provides peace of mind during system outages, which can occasionally render digital boarding passes inaccessible. Therefore, while you can technically navigate most of your journey with just a phone, carrying a single-page printout of your itinerary and confirmation numbers is a small effort that serves as an essential "insurance policy" against technology failure.