[wheybags]

Me too, but I don't have a local bank account. You can't sign up for a Navigo Liberté (pay as you go card) without a local IBAN (which is illegal, there is an EU law that anyone accepting bank transfers needs to treat accounts from all EU member states equally). So I buy paper tickets. This is really dumb. Paper tickets work, just leave it alone.

[joeblubaugh]

Paris’s paper tickets work until you keep it in your pocket next to your phone and the strip demagnetizes. Happened to me twice before I figured out what was happening.

[BrandoElFollito]

Just for information: you can ask to have it replaced at any station that has human presence