“The notion that an [improper] conversion could be annulled after the fact.. is found on occasion and R. Baruch cites some authorities who speak about this very point. Thus, it is not, as has often been alleged, a modern haredi idea with no historical basis although, as mentioned, it was very rare”
Midwest2,
That is rather accurate. Some of the old Russian jews who help the Rabbis have a remarkable sense
of just who is legitimate or not.One of them[he since passed away] was invariably right on