Yep... post arrives to "O'Rourke", websites tell me "your name is invalid", checkouts tell me my details are incorrect so I can't pay. And not just small sites - I've seen it on banks, large retailers, companies who should know better.

Sometimes it's due to a legacy back-end system dating back to the 1990's or earlier, so they have to strip out "bad" characters before sending the order or contact form through.