Documents needed when entering in France
Whether or not you are required to obtain a visa before travelling, even if you are an American citizen (, you may be requested to show the following elements to the French immigration officers upon arrival :
1. a valid passport ( (still valid 3 months after your expected return from France),
2. a return plane ticket (for a short stay only),
3. means of support during the stay (cash, credit cards, traveler cheques…)
4. accommodation reservations or, for some visa holders only, an "attestation d’accueil"