Does one need to inform someone that the food they are about to eat is permissible b'deved(after the fact)?
Example 1: Some milk fell into the chulent and the Rabbi employed batel b'shishim and now the chulent is mutar b'deved.
Example 2: If a caterer was preparing food for a wedding and there was a mess up ,and he asked a Rabbi who permitted the food because it is a case of hefsed m'rubah(great loss) and now the food is allowed b'deved.
In these cases does the baal habais have to inform his guest(s) that the food is in a b'deved state?