I have been marked as a respondent without being served summons

Respected sir, I recently came to know by looking up the court website that I am a respondent in an appeal suit. I have never been served a summons and I do not know anything about the contents of that suit. I live abroad. How can I know what that suit is about? How do I inform the court that I have not been served and am deprived of the proceedings in that matter? please advise.