I'll be taking a train from London to Paris and back later this year. I had to enter passport info to get the tickets so I entered my current expiration date. I'll be renewing my passport before my train travel though, so I'll have a new expiration date. All other information will be the same. That won't be a problem, will it? If it is an issue, how do I correct it?
Thank you for any helpful information you can offer!