Purpose: To assess the potential of a paper diary for strengthening accountability in public agricultural extension services. Therefore a paper diary called 'Diary for Agricultural Extension Officers' was developed and tested in Uganda. Design/methodology/approach: A qualitative case study research approach was applied for the development and assessment of the diary. Data were collected using focus group discussions and individual face-to-face interviews. Data analysis was conducted using the content analysis method. Findings: Paper diaries can strengthen accountability in public agricultural extension services by enabling alignment of the extension activities of the field agents to the goals of the extension service and to the needs of the beneficiaries, in addition to mitigating information asymmetry about the extension activities. However, the implementation of paper diaries requires sensitization of the beneficiaries on the need for verification and feedback. Practical Implications: This study is centred around addressing a practical problem of field agents' accountability and results have the potential to improve management of public services such as agricultural extension. Moreover, the findings could also be relevant for all types of organizations and service delivery methods. Theoretical implications: This study expanded the boundaries of the principal-agent theory by applying it to the accountability of agricultural extension services using paper diaries, which have hitherto not been widely applied. Originality/value: This study advances the debates of accountability and coordination of agricultural extension services by assessing the potential of a paper diary as the literature has to date assessed the potential of electronic diaries.