Generally הודעת בעל דין כמאה עדים דמי, MiGzeiras Hakosuv. However, in a case of שחב לאחרים, where his admission to debt or the like would cause others some loss, the baal din still has Neemonus, unless there is a חשש קנוניא, a suspicion that the Tovea and the Nitba have colluded together to gain money of לקוחות.
I am trying to grasp the definition of חשש קנוניא. Is that simply a situation which would permit the possibility of a קנוניא, thus automatically the Baal Din cannot be Modeh anymore, or conversely, is it just a situation which the Bes Din has solid rational to believe that they may be plotting, but generally without reason to suspect them, even if the case could allow a possibility of plotting, but Min Hastam without any based suspicion he is believed?
Reuven, amongst others, invested money into Shimons project, which לקוחות baught into. The project reached some diffulties and did not see through. Reuven wants to claim his money back from Shimon, and shimon, is Modeh to Reuvens claim, and least from some of the money. However, Reuven getting his money back would mean it being collected from לקוחות that the money was invested into.
That case could be a possibility of colluding, but the Bes Din has no basis to suspect them of such. Is Shimons Hodoah that he indeed owes Reuven money, automatically invalid due to such a possibility, and it is regarded by the Bes Din as חשש קנוניא, or not.
I would appreciate any sources to do with the above question or case. Many thanks in advance!