Will you still have self-employed work back home while working in Germany?
Is your stay in Germany intended to be a temporary one?
Are you registered self-employed where you are normally resident outside Germany?
Is there a degree of independence
so that you are not in an employment relationship with your client?
Is your agency/client happy that you are not employed under an AuG solution?
Where is that? Is it one of these Treaty Countries?
Belgium, Canada, Denmark, Estonia, France, Hungary, Italy, Japan, Lithuania, The Netherlands, Norway, Poland, Portugal and Spain.
Will you be leaving your home and/or family back home where you are normally resident or not?