Anonymous wrote:We have had the same problem as OP. Our last name is similar to O'Brien. We enter it that way but often the boarding pass will say Obrien. Our daughter was flying home after studying abroad and they gave her trouble because her boarding pass and passport didn't match identically.
It worked out and they eventually let her through, but it was the system that messed it up.
By "they gave her trouble," I assume you mean that it took her 2 extra minutes or less at security? This is not really a problem. It does not cause people to miss their flight or anything remotely impactful.