This is not the first time this has happened. An error with Europcar’s contact from, saying forbidden characters where entered. It doesn’t mention which field is bad.
A great example of how to stop your customers contacting you, make it impossible.
Upon further investigation, it turns out you can’t have apostrophes in the comments box..
The next problem is the enter Europcar ID OR your details (Name, email etc). But email is mandatory.
I have to say Europcar’s website is the buggiest / most annoying website I’ve used in recent memory.