Detailed information about organization Information about alert on kosher products 2015-11-18 Source of information Information from OK Kosher , USA Website https://www.ok.org/kosher-alert/rostan-corporation-is-no-longer-certified-kosher-by-ok-kosher-certification/ Notes Please be advised that As of November 18, 2015, ROSTAN CORPORATION (and All it’s baked goods) is no longer certified kosher by OK Kosher Certification. Rostan Corp. has been inactivated due to kashrus violations.