You can ask the Bi- and Trilingualism Examination Service of the Autonomous Province of Bolzano for recognition of the internal unibz examinations in Italian or German levels B1, B2 and C1 that include the four language skills (reading, listening, writing and speaking)*.
If you have taken and passed a level B1, B2 or C1 exam in German or Italian, you can obtain a certificate from the Language Centre that you have passed this exam, which you can hand over to the Bi- and Trilingualism Examination Service of the Autonomous Province of Bolzano, where you will then have to take the exam in the other language.
To receive the certificate, you must send an email to email@example.com indicating your name, date of birth, matriculation number, language and level of the exam for which you are requesting the certificate and that you need the certificate for the recognition by the Bi- and Trilingualism Examination Service.
You can find further information on the recognition of language certification by the Bi- and Trilingualism Examination Service on the provincial office website.
*Please note: It is not possible to take language exams in order to obtain a bilingualism certificate in the language of the secondary school where you obtained your high school diploma and for which you already have a level C1.