BACKGROUND: This study addresses the limited knowledge among Polish family doctors of scales for evaluating palliative care patients and their ability to assess symptoms using those scales. The aim was to identify the potential advantages and disadvantages for implementing this type of tools. METHODS: A Computer-Assisted Web Interview (CAWI) was conducted among primary health care doctors. The survey assessed knowledge and usage of selected medical scales (KPS, ECOG, NRS, Barthel, Katz, ESAS, and a non-existent scale for bias check) in the daily practice of family physicians in relation to palliative care patients. RESULTS: The study analysed responses from 706 doctors, revealing significant gaps in their knowledge and practical application of the scales. It presented lack of familiarity and inappropriate application of 4 out of 6 scales. Over 66% of surveyed doctors couldn't identify the appropriate tool for assessing the quality of life of patients with heart failure, and over 76% could not identify the appropriate tool for assessing shortness of breath and constipation. Based on the NRS pain scale this study indicates that knowledge of a scale translates directly to its practical application. CONCLUSIONS: Appropriate educational activities should be provided to support GPs in broadening their knowledge and in using selected scales. Further studies need to be performed not only in the area of tools validation but simultaneously on how to disseminate the usage of those tools.