SGH does not specify any enrollment prerequisites for potential exchange students. Already by nomination, partner university guarantees that students have strong academic background and relevant skills.
However, to attend some courses certain requirements have to be met. These should be indicated in the course syllabi available on: https://dziekanat.sgh.waw.pl/wd_nowy/wi_wyszukiwarka.php
Partner school must ensure that artner school must ensure that nominated student has a suitable command of English (or Polish) language. The minimum required level is B2 in CEFR scale (http://europass.cedefop.europa.eu/sites/default/files/cefr-en.pdf) which corresponds to one of the below mentioned certificates:
CAE (grade C)
FCE (grade A)
TOEFL iBT 79