Background: Imagery Rescripting (ImRs) has received increasing attention in the past decades. It proved to be effective in reducing symptoms associated with aversive memories in a range of mental disorders, including anxiety disorders, eating disorders, and posttraumatic stress disorder. Given its proposed working mechanisms, ImRs may also be a relevant treatment strategy for prolonged grief disorder (PGD), where negative appraisals, helplessness, and unmet needs play a key role as maintaining factors.