From The O/U: Mamtakei Leda

The Orthodox Union does NOT certify any products from Mamtakei Leda Company.  Some Mamtakei Leda products were labeled with a sticker that bears an unauthorized O/U symbol.  

From The Star-K: GE Sabbath Mode Ovens

Effective January 1, 2022, GE began marketing their Sabbath Mode ovens WITHOUT Star-K certification.  Certified ovens purchased and delivered prior to January 1, 2022, remain certified.   Consumers seeking to purchase cooking appliances compatible with Shabbos and Yom Tov are advised to select models certified by a reliable Kashrus organization.