Proof of vaccination refers to documentation showing that a person has received required vaccinations, most prominently discussed during the COVID-19 pandemic. The federal government required proof of vaccination for air and rail travel within Canada and for federal employees. Several provinces implemented vaccine passport systems for accessing restaurants, gyms, and entertainment venues. Some municipalities added their own requirements for municipal facilities. The documents took various forms including paper cards, QR codes, and digital certificates. While most COVID-19 vaccine requirements have been lifted, proof of vaccination remains relevant for international travel to some countries and routine requirements like school immunizations.