I need legal document from Germany for Study VISA -- 2

It is mandatory to get an obligation letter from a German permanent resident or citizen to apply for student visa in Nigeria. My sister who intends to study in Germany needs this letter as part of her documents to apply for study visa at the Germany embassy in Nigeria. This is for serious minded people only. My sister is responsible for her payment and fee. She is also of good behave and character. Kindly click on the link below to know more about the German obligation letter. [login to view URL]