Is it possible to change a train ticket?

Related questions

1. Are TGV tickets refundable?
2. How much is TGV from Paris to Nice?
3. Can I take another train with same ticket?
4. What happens if you get on the train without a ticket?
5. Are French railways Nationalised?
6. Can I change Advance single ticket?
7. Is British Gas owned by a French company?
8. Is a penalty fare a criminal record?
9. Can you exchange train tickets?
10. Are Thalys tickets refundable?

Tags

1. #logging
2. #ticket
3. #industry
4. #changed
5. #different
6. #purchased
7. #advance
8. #amended
9. #difference
10. #there
11. #paying
12. #tickets
13. #admin
14. #standard
15. #change
16. #required
17. #route
18. #addition
19. #account
20. #cannot