Questione giuridica chiave
Whether the federal complaint against refusal to renew the residence permit was admissible.
Decisione estratta
It was inadmissible because no federal or international right to the requested permit was shown.
Motivazione estratta
Complaints are barred under Art. 83 lit. c BGG for permits without a legal entitlement; the applicant did not establish a claim, and discretionary/hardship-based residence permits confer no right.