Here’s a clear, ready-to-use write-up explaining in English and French, depending on your audience (e.g., for a transport guide, HR document, or FAQ page). English version (for international commuters / employees) What is a “Pass Navigo justificatif”? A justificatif (proof document) for the Pass Navigo is an official receipt or certificate confirming your Navigo travel pass subscription (monthly or weekly). It is issued by Île-de-France Mobilités (IDFM) or RATP/SNCF.