Crisis Communications Target alerts customers to huge credit card info breach The retail chain said data from 40 million customers may have been compromised. The company issued a lengthy instruction guide for customers. By Matt WilsonDec. 20, 2013 SHARE Ragan Insider Premium Content To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.