A Greece Passenger Locator Type is necessary if you are traveling to Greece and need to comply with local path and trace requirements before boarding the plane. The form could be filled out in person or via email, fax or e-mail. In any case you will be asked to provide evidence of your identity, a current photograph and a copy of your passport. You'll also be required to declare in which you live and any other location which you would love to go to Greece. A PLF is a legal document that demonstrates you have legally traveled to Greece and got the essential travel documents.