I am currently an undergraduate student in India, and I have been invited in the summer for a research collaboration (technically a summer internship) to a German institute. I have been provided with a scholarship contract, and an invite letter, but no Bundesagentur für Arbeit. I have been instructed by the supervisor to apply under the guest scientist/researcher category, but does that apply to me?
Additionally, I applied earlier in the month under the student internship category and got rejected - would it be okay for me to change categories and submit the same documents?
Edit: BTW- We applied under the internship category without the work permit, did not work. Always ask the administration directly, or clarify all details with the embassy.