score:6
We had no problems. We checked with a customer service agent at Stansted - we didn't give the full details, but asked something like "will the ticket definitely have the same name as the bording pass?" and he said that the boarding pass was the ticket and we were fine. And then we got through with no problems or anyone asking questions or looking at us funny or anything.
Upvote:7
If you are given the boarding pass, the airline has all the details they need to issue you the boarding pass. However they might not necessary have all the details they need to let you board the plane. In this case, when boarding, you typically are pulled aside, and missing details would be entered into the system. Some airlines (WizzAir in my case) also ask everyone who did web check-in to line up in a different queue where they do this check.
If in doubt, you can go to the airline check-in counter with your boarding pass, and ask if they need anything else from you. RyanAir explicitly asks non-EU passengers on some flights to do so.