Kickbacks are payments made to someone in exchange for a service or favor. They can take many forms, such as RECOILS, sops, and rebates. RECOILS are payments made to someone in return for a service or favor that has already been provided. Sops are payments made to someone in order to induce them to do something. Rebates are payments made to someone after they have completed a task or purchase. All of these payments are considered kickbacks.