Why is the fear that the yisroel would give his bechor to his worker kohen a valid concern? the first of r yochanan or r elazer he says that A Kohen working for a Yisrael is not believed. He thinks 'since I work for him, he will give the Bechor to me when it gets a Mum.' Perhaps the Kohen will lie but why is that a hava amina we learned on daf 26b that if you have a kohen working for you it is assur to give him matanos

Yossi beller, Monsey ny usa