Robert Triffin, a non-lawyer who has filed more than 15,000 claims in New Jersey courts, has not been a welcome figure in the judicial system. He makes a living purchasing dishonored checks from check-cashing agencies and then suing the issuers or their banks.

But his practices have been labeled a “fraud on the court,” and he presently is under an injunction that he certify in every case that the signatures on the assignments of checks to him are, in fact, genuine and not computer generated.