Key legal question
Whether the complainant had standing to challenge the non-prosecution decision under Art. 81 BGG.
Extracted holding
He lacked standing because he was not a private plaintiff in the cantonal proceedings and could not show that the alleged offences affected any civil claims of his own.
Extracted reasoning
The cantonal court convincingly stated that the complainant was not harmed by the alleged forgery and that success of the complaint would not give rise to civil claims; rather, it would undermine the basis for a legacy he had received. The appellant did not rebut this.