Background: In studies enrolling informal caregivers of patients in palliative care, it is necessary to ensure that findings are not influenced by factors such as mental disorders.; Aim: This study aims to describe the influence of anxiety and depression on bereaved informal caregivers' retrospective ratings of the quality of dying and death (QoDD) of their loved ones.; Design: Informal caregivers of deceased patients from 2 German palliative care (PC) units took part in a validation study of the German version of the original QoDD-Deutsch-