PurposeThis paper provides new insights on trust formation during information-seeking processes of informal caregivers of people with dementia and identifies the sources of information deemed as trustworthy by caregivers.Design/methodology/approachThe study adopts a phenomenological qualitative approach in the form of in-depth, semi-structured interviews with a sample of 20 informal caregivers.FindingsCaregivers trust sources that are perceived as authoritative and particularly value the information and advice provided by other caregivers. Trust in information can be divided into subjective and objective, but both are important precursors to the actual use of the information. The information available to caregivers is sufficient in quantity but inadequate in terms of ease of use, clarity and usefulness. Often, some key information needs remain unsatisfied due to the lack of timeliness, relevance and personalisation of the information.Practical implicationsThis paper provides recommendations for information and healthcare providers on how to improve communication and information relevance for informal caregivers of people with dementia.Originality/valueThis paper contributes to a more comprehensive perspective on caregivers’ information trust formation processes, which takes into account both the characteristics of the information and caregivers’ individual factors.