nsumner

Somewhat ironically in EY Rav (Yaakov) Landau (a Lubavicher) ZT”L ruled that in fact the din is mi’ikar hadin that self certification is NOT valid.

He ruled that although yesh neamanos (there is trust) in Kashrus, hence you can trust me and eat in my house even though (obviously) there is no certification. However he said a restaurant is dinei mamon; v’ein neamanos b’mamon, there is no trust in money. Since the owner could increase profits by chas veshalom using treif cheese, and he is interested in the profits at the end of the day. Therefore this is a question of money and not standard kashros. Hence according to that ruling the restaurant under self-certification is not worth anything.