The most important documents are the freelance visa application form, proof of suitable health insurance and proof of residence in the state you're applying (i.e. the Meldebescheinigung/Anmeldung). Without one or all of these, you'll be swiftly shown the door.
Imibhalo ebaluleke kunayo yonke ifomu lokufaka isicelo se-visa njengomsebenzi ozimele, ubufakazi bomshwalense wempilo ofanele nobufakazi bendawo yokuhlala esifundazweni ofaka kuso isicelo (okungukuthi i- Meldebescheinigung/Anmeldung). Ngaphandle kowodwa umbhalo noma yonke lena, uyoxoshwa.