Is it permissible for a sponsored student who has completed his studies, and whose certificate will be issued late, after the end of his original sponsorship period, to request an extension for six months—bearing in mind the possibility of appointing someone to receive the certificate—and what financial benefit results from that?

It is permissible for the student to extend their stay after studying to complete procedures and receive the certificate, provided that this is done correctly without bribery, cheating, or violating the conditions of the granting entities, and they are not required to appoint anyone as an agent. However, if the extension is conditioned on cases other than what has been mentioned, then it is not permissible to extend at the expense of the granting entity.