WHO, ICAO and IATA advocate the use of the same Passenger Locator Card. See instructions:
IATA Passenger Locator & Health Declaration Card
Some countries' immigration and health authorities require passengers to leave a health and travel history record. In those cases, IATA suggests the use of a card based on the Passenger Locator Card standard and providing an additional section, the Health Declaration Card:
Download the suggested IATA passenger locator & health declaration card: