Yosef Karo

“ One whom is forced to convert that remains in our lands, if he keeps kosher, whether with them or on his own, and is not able to flee so that he should be able to serve G-d, we can rely on his ritual slaughter and he does not forbid wine with his touch. ”

“ And thus if one gives something to an innkeeper who is suspect, sometimes he is embarrassed of his guest and will switch something bad for something good. (And in any case, it is permitted to deposit items with him and they should be in the same state as when they were deposited) . ”

“ One who sells forbidden foods, he should remove and destroy them, and there is no reparation that can be done unless he moves to a new place where they do not recognize him and return lost items or slaughter for himself and cease producing forbidden foods, so that his repentance will be without tricks, since he would not himself transgress. ”

“ And if it is given to someone who we suspect will fix the dish, and he is suspected of eating non-kosher, it is forbidden, as perhaps he will damage what he was given and then switch it out with his own food. How? If one gives something to his mother in law who is suspected regarding forbidden things, it is forbidden, because she is worried about your marriage, and she wants to make her daughter look good, and therefore she will switch out something bad with something good. ”