In the application for waiver (DS-3035) (online and paper) there is requirement for Visa Control Number, Issuing post etc. (Line 17) . Since I am Canadian I only get I-94, and passport stamped at the port of entry, without obtaining visa (sticker). I tried entering i-94 number, ds2019 number but both were rejected (online application). I was wondering if anybody figured the way around this obstacle.