We are flying with Monarch, but I booked the ticket through a package holiday company and forgot to give my husband's middle name at the time of the booking (they did not ask for it). We will travel to Tunisia and will have to provide API (Advance Passanger Information) at the check-in desk and as the API requires the full name (first, middle and last name) I am worried that they will notice that my husband's middle name is missing from the flight reservation.
Is there a rule that flight tickets have to contain middle names as well? I checked Monarch's website and although the middle name is emphasised for the API, it is not specified for ticket bookings; moreover, if you book your ticket online, they only ask for first name and surname.
Do you think this could create a problem? Can he be denied from boarding? (I don't want to call the airline, as I've heard airlines love charging for extras such as a name change so I am not sure if I would be provided with accurate information.)