You can start your journey from any Metro/RER station within zone 1 or 2 to catch the RER A (you can change to the RER at various stations - Charles de Gaulle Etoile, Auber, Les Halles, Gare de Lyon and Nation) or from any station on the RER A line between the stops of Charles de Gaulle Etoile and Marne-La-Vallée-Chessy (Disneyland Paris Park stop).
This is a material ticket which will be sent to you by post.
NB: If you decide to physically leave the underground system during your journey, your ticket will no longer be valid. For a return journey, please purchase two tickets per person.
Please note that Paris Metro tickets and RER tickets have a magnetic stripe on the back. Please take care not to bend, tear or scratch the tickets and keep them away from mobile phones. If one of the tickets doesn't work on the day of use, you will be able to take it to any RATP booth in Paris and ask for a free replacement.