You should first send the necessary forms for the dissertation submission in advance by e-mail to the doctoral office, and afterwards you must send all the forms signed by hand - preferably with a ballpoint pen or pen - by post to the doctoral office. The same applies to the application for admission to the doctorate. The processing takes place promptly on the basis of the documents sent by e-mail. If you apply for an extension of the standard processing time, the electronically signed version of the form is sufficient.