In the Mishna, Sotah 4:5 (and Bavli 27a) it explains that in certain situations Beit Din may warn a woman not to be secluded with a man and this warning carries the legal status of kinuy such that if she is secluded with the same man later on she may lose her ketubah. I recall learning, but cannot find, a Sifre which extends this ability to warn to 'neighbors' as well.
I would like to know if there is any halachic discussion as to what the status would be if any person, besides Beit Din and neighbors, warn a married woman about seclusion (in a case where the husband cannot, such as if he is in jail). Are other people also able to trigger kinuy such that she can potentially lose her ketubah, or is it only the Beit Din and 'neighbors'?
