By 2026, the traditional paper "blue form" handed out on airplanes has been largely phased out in favor of digital declarations. For travelers entering the U.S., you should download the Mobile Passport Control (MPC) app, which allows you to submit your declaration digitally before you even hit the baggage claim. In many other countries, like India or Australia, you are now required to fill out an "Electronic Arrival Card" or e-declaration via an official government portal up to 72 hours before your flight. If your destination still uses paper, the flight attendants will distribute them about an hour before landing. A supportive 2026 tip: always check your airline's app a few days before you fly; many now integrate the customs form directly into the check-in process, allowing you to breeze through the "Nothing to Declare" green lane upon arrival using just a QR code.