In accordance with DAAD we do not send any more letters to prove that you are in contact with us. When applying for a DAAD scholarship, you would have to also prove to them that you meet the relevant criteria to apply for the course (i.e. evidence specifically of having completed undergraduate courses in the relevant subjects. All specific admission requirements are listed on the respective programme's web page). This is sufficient. Should there be further questions, please contact DAAD directly about this matter.