An anonymous monthly pass
The CNIL had asked that any carrier responsible for automatic processing of personal information allow the provision of an anonymous ticket thus respecting privacy (https://www.cnil.fr/fr/declaration/au-015-applications-billettiques-des-transports-publics).
This has been done, since with the Navigo Découverte pass, you write your name on it yourself (as was the case for the Orange card a few years ago), which means that you are not in the RATP customer database.
About the Navigo Découverte pass
The Navigo Découverte pass is not free; it will cost you 5 euros to preserve your privacy.
Please note: if you lose it, you will not get your balance back.
You can load it for 1 day, 1 week, or 1 month. It is not possible to load it for 1 year.