In order to obtain certificates of accomplishment, you must have a Politecnico di Milano account. If you don't have one yet, create it (How can I create a personal Polimi account?) and make a note of your person code.

Then send an e-mail to pok@polimi.it: indicate the name, surname and person code of your Polimi account and the username and e-mail address of your POK account, asking for the two accounts to be merged.

Once the process is complete, you will be able to log into POK with your Polimi credentials while maintaining the progress of your previous account. From this moment on, you will be able to obtain your course certificates.