The historicity of early Islamic diplomatic documents, referred to as the covenants of Prophet Muhammad, has received considerable scholarly attention over the past decade. This article is the first to present a critical examination of the reception of the Prophet’s covenants among interfaith actors. An educative intervention instrument was used to examine how research on the historicity of the Prophet’s covenants influences participants’ thinking about interreligious relations in Islam. With reference to Stuart Hall’s audience reception theory, the study found that most participants adopted the ‘preferred’ reading of the educative intervention material, while minorities adopted ‘negotiated’ or ‘oppositional’ readings. This article discusses these findings, highlighting that participants’ openness to new religious knowledge, prior views on interreligious relations in Islam, and knowledge of primary Islamic sources influence reception of the Prophet’s covenants.