In imperial Chinese society, "tamfa" is an honorific title, but it's also a post in the government bureaucracy, which means it comes with certain official duties/responsibilities. It is not an inherited noble title, but an office earned by achieving the third highest score on the imperial civil service examination.
Lee Chum Foon was frequently addressed as "Lee Tamfa," but throughout SENTIMENTAL SWORDSMAN, RUTHLESS SWORD, we never saw him carry out any official duties as a tamfa. We saw him drink, moon over his complicated relationship with Lam See Yam and Lung Siu Wan, and get into wulin disputes with his notorious flying dagger, but never put in a day's work as a tamfa. Did he ever actually do anything in his official government post, or did he take the stereotype of the useless government bureaucrat to a ridiculous extreme?