The meaning of opt-out is to refuse permission or cancel something. That said, you should still use standard "STOP" wording in your optout instructions.This will prevent opt-outs from getting complicated. In the opt-out procedure, a person gives their silent consent, for example, to the setting of tracking cookies or to receiving a newsletter. In this article we'll show you how to create this clause and successfully present it to your user base in an effective and legally compliant way. To opt out, reply NO. Example: Hey Jack, Don't want to hear from us? It's OK. You can reply STOP to unsubscribe at any time. For example, your welcome message may include "Reply STOP to unsubscribe. This sample parent opt-out letter gives parents a way to formally opt-out of the breakfast program if they choose. Program: School Meals; Categories.