Are you already planning to write a Master's thesis and have you fulfilled all requirements for it?
Every semester there is a time window in which you can register your Master's thesis. For this you have to fill in a Master's Thesis Contract with the title of the planned Master's Thesis and with the signatures of the advisor and co-supervisor. These persons must hold a doctorate and at least one person must hold a professorship at the Faculty of Humanities and Social Sciences at the University of Basel. Exceptions can be granted by the Dean of Studies upon request.
The Master's thesis is written within a period of approximately nine months. However, one cannot take a leave of absence during this time, but must be enrolled as usual. Usually a Master's thesis is 70-90 pages long, but exact expectations have to be discussed with the supervisors in advance!
The thesis must be submitted directly to the supervisor. A supervisor must also confirm this submission in writing. A statement must also be submitted.
All details can be found in the regulations of the Faculty of Humanities and Social Sciences.