Sextortion (sexual extortion) is the term coined for the solicitation of sexual activity, images or videos under threat or duress, usually against children. Sextortion a new and developing offence under the image-based sexual abuse umbrella, and shares traits of blackmail, grooming and child sexual abuse. This chapter explores what is currently known about sextortion and blackmail (and how the two are linked) and provides an overview of cases, exploring who commits the offence and how the offence occurs. Using secondary data sources (newspapers, court reports, etc.) the facts of cases were analysed and coded using basic comparison processes. It was found that sextortion is usually committed by younger men by creating fake accounts to access and blackmail multiple victims at once. The defendant usually gains access to the victim using chatrooms, social media, or by gaining unlawful entry into their devices (hacking) and request victims provide self-generated sexual images, but some encourage victims to engage in sexual activity with others. The findings from this chapter add to existing prevention and protection strategies, and will aid to inform new strategies, to help best allocate resources and efforts.