An important part of the work of forensic scientists is communicating accurate information to lay factfinders under conditions of uncertainty. It is an ethically demanding role as it obliges scientists to disclose information that may call their own authority into question. Similar issues arise in other areas of applied science, for example climate science. This article builds the ethical framework for scientific communication under uncertainty proposed by Keohane, Lane and Oppenheimer and argues that with some modifications their work provides useful guidance for forensic scientists. It also questions whether the current system of Streamlined Forensic Reporting is compatible with that framework.