I know that there are already some similar questions, but mine is a little bit different, so let me ask it here:
I applied to two PhD position in mathematics in southern Europe. I just got accepted for one of them together with a full scholarship. They ask me to accept the offer within 8 days, because otherwise it is automatically declined. Now, the point is that in order to "accept" the offer, I have to officially enroll to the university through the online platform. So there I don't have to simply write an email with "I accept", but directly pay the tuition fees and get enrolled.
The point is that the position where I just received this offer, is my plan B. For the other unveristy, which is my plan A, the application procedure is still runing. More precisely, I have been invited to an interview next week, so I guess that the final decision at this university will be made in the mid of August.
My first question is the following: Obviously, I should accept my offer from university plan B, since it would be super risky to just decline it in order to hope that plan A is going to work out too. However, in case I get indeed accepted to plan A, is it then possible to withdraw the first offer? Even after the official enrollment? I would guess yes, because in the end of the day they cannot force me to start, but on the other hand, if money is involves, things are usually more complicated (e. g. Some notice periods or whatever) ...
On the other hand, I guess that many people have been in situations like this, because in the end, most people are applying to several universities/places and have there favourites among them...
(Maybe I should also add that I am not in touch with any Prof at university plan B. The choice of supervisor at this university only starts in autumn at the beginning of the semester. So, there is nobody I would have to apologize in case I withdraw.)
Second question: If I want to get sure if it is always possible to withdraw the position even after accepting/enrollment, I probably should write an email to the university of plan B. However, is this a good idea? Is this something I can ask without sounding that I am not interested in this position, or that I am hoping "to find something better"?