Background Musculoskeletal complaints have a significant impact on work in terms of reduced productivity, sickness absence and long term incapacity for work. This study sought to explore GPs’ and physiotherapists’ perceptions of sickness certification in patients with musculoskeletal problems. Methods Eleven (11) GPs were sampled from an existing general practice survey, and six (6) physiotherapists were selected randomly using ‘snowball’ sampling techniques, through established contacts in local physiotherapy departments. Semi-structured qualitative interviews were conducted with respondents lasting up to 30 minutes. The interviews were audio recorded and transcribed verbatim, following which they were coded using N-Vivo qualitative s...