I have heard that a m'zuza must be checked twice every seven years by a qualified sofer. I have also heard that, assuming it's known to have been kosher at one point, it need only be checked for faded ...
I recently heard that in Belz they changed the Shin on the Tefilin Shel Rosh due to an old pair that was found that the Rebbi believed to be the true Mesorah. Is this true? How does the new Shin ...
Not sure if this question is on topic but here goes. Background There is a STA"M textbook called מאיר עיני סופרים which summarizes the rulings of the major sources on hilchos STA"M for ...