uni-assist e.V. does not cooperate with commercial agencies in or outside of Germany to mediate the placement of applicants at German universities. Some institutions claim to be connected to uni-assist. Official information on applying to uni-assist universities is available only on the websites of the universities and on https://www.uni-assist.de/en/.
The university accepts online-only applications for uni-assist‘s pre-check. Simply submit your documents as uploads. In some cases, you will need to submit officially certified copies to the university later. Please inform yourself at the university about its application procedure.