A DOCTOR who signed insurance claim forms without fully examining patients was suspended for four months yesterday. The Medical Council heard Dr Cheung Sai-chun had been sentenced to nine months' imprisonment, suspended for two years, in June by Eastern Court on three counts of false accounting. Dr Cheung, 55, had agreed to issue three medical certificates as requested by an insurance agent in December 1993. Another two sick leave certificates were also given out. The certificates were used as evidence to reimburse three insured persons for more than $9,000 in total. He received $1,400 from the agent in fees. Symon Wong, defending, said Dr Cheung had not sought monetary rewards. 'The three patients in question were indeed suffering injuries and it was not a situation in which Dr Cheung conspired to cheat the insurance company.'