You need a parent's Australian birth certificate if you were born after a certain date. Unfortunately, Luke is not in contact with either of his parents for reasons that I won't go into here. So, he had to apply for a Citizenship Certificate (which is why we had to postpone the honeymoon from January to February), and we have been told that even then, it is up to discretion whether or not that will be accepted as valid...
And, the person we had sign his photos as guarantor is not enrolled to vote as we were led to believe, so Luke has now got to get someone else to do it. I am going to ask him to double and triple check that the new person is enrolled, because one more delay and we may not get his passport in time.
I cannot afford to reschedule the flights again. I already had to spend $800 to do that. So, if he cannot make it this time, we may have to cancel the flights, lose my money, and save again, then we may get there in another year or two...