Food records are frequently used to monitor dietary intake. Food record information combined with clinical knowledge and counselling enables dietitians to determine if additional nutrition intervention is necessary and furthermore prescribe the most appropriate supplement to meet dietary requirements. This study aimed to investigate the accuracy of patient food records for meals and midmeals as documented by nursing staff compared with those completing dietetic training within the rehabilitation environment of a tertiary teaching hospital. Nursing staff and two dietetic students independently completed food records of patients identified as malnourished or at risk of malnutrition. The mean age of participant in this study was 81 ᠸ years and 62% were male (n = 13). Findings revealed that the median total energy intake reported by nurses and student dietitians was 5 MJ (range 1-11 MJ) and 7 MJ (range 2-12 MJ) respectively (p < 0.001). Nursing staff also documented lower protein intake (median 56 g, range 13-109 g) compared with student dietitians (median 77 g, range 25-122 g) (p < 0.001). Compared with student dietitians, food records completed by nursing staff documented less total energy for 67% (42/62) of recorded meal/ midmeals and less protein for 77% (48/62) of recorded meals/midmeals. Daily median differences of approximately 2 MJ (range - 2-6 MJ) and 15 g (range - 37-64 g) of protein were evident between the nursing staff and student dietitians' food record estimates. Implications of under-recording dietary intake may lead to unnecessary supplement prescription and additional education and counselling by dietitians which inevitably increases costs to the health system.