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 ...
Rav Y. Abadi holds that nowadays, there is no need to check our rice for pieces of Hametz due to the way rice is manufactured. http://kashrut.org/forum/viewpost.asp?mid=11648&highlight= Are ...
In regards to kosher supervision, what is the largest single gap that a mashgiach can leave the premise and still be considered practicing יוצא ונכנס?
I know the p'sak of the Aruch HaShulchan, that you must check the sheets after the 2nd/3rd time a newly-married couple are intimate. I heard that there is a more lenient opinion that you don't even ...
Does anyone know of any rabbinic sources (Talmudic/midrashic) that indicate that a Zav would go to a halakhic authority to be examined regarding his Zivah?