To echo some of the advice already given - I'd turn up a bit early just in case.

A couple of years ago my gf booked a long weekend away as a surprise - which didn't get off to the best of starts as she'd forgotten the card she used to make the booking. The check-in girl reduced my gf to tears by stating quite forcefully that we couldn't fly at all without the card used to make the booking..

Obviously I intervened and everything was ok after a Derren Brown moment - 'look into my eyes, we are on this flight, you want to hand us our boarding passes' - but it was a shock.

Anyway it's certainly nothing to worry about - I think the worst case is you'll need to have a bit of a chat and waste a few minutes.