I have been offered and have accepted a position at a university. The position is not advertised yet, but they will advertise it because they are required to. Is this something common in academia? To be more clear on what happened, prior to the offer I sent my CV as a respond to another similar position which they advertised, but it was to be filled immediately and so I was ruled out. I guess after looking at my CV and having further conversations with me they were keen for me to join them and so they offered me this new position. But because they are required to, they have to go through another round of formalities.
I did ask the head of department how he could be sure that I would be the most suitable person for the job and told him that others might be better candidates, to which he said something to the effect that he saw me as suited for the group. But since I have not signed any contracts yet, how can I guarantee that I will eventually get the job? From the time I accepted the offer, I have stopped looking for other jobs, and have withdrawn my other applications, but since there are no contracts signed yet, I am a bit worried.
Perhaps another question I should ask is why are universities required to put up advertisements and to go trough all the formalities if they already decided on someone?