Background: Multimorbidity tends to increase with age. Providing care that is individualized and that focuses on the whole person rather than on separate health issues is a challenge for healthcare, due to a lack of coordination and information exchange. In the future, relatives will need to take even more responsibility for their next of kin. Objectives: The aim of this study was to explore relatives' views of aspects that create a sense of security and feelings of quality of care related to acute mobile geriatric care for older people in their own homes. Methods: Data were collected using semi-structured interviews analysed using content analysis. Findings: This study is reported in accordance with the COREQ checklist. Interpersonal factors such as straightforward communication, empathy, having time for the person, a focus on the person, and having a few known caregivers who are easy to contact, rather than more clinical factors, have been identified as central to creating a sense of security and quality of care.