Giving talaaq (divorce) three times at once
    is bid’ah
Question

                Could you please let me know according to
      the Shafi mishep, if a man can give his wife Talaaq tree(3) times at once.
Praise be to Allah.Giving talaaq (divorce) three times at once is bid’ah, and
    goes against the aayah (interpretation of the meaning): “… When you divorce
    women, divorce them at their ‘iddah (prescribed periods)…” [al-Talaaq
    65:1]. If a Muslim wants to divorce his wife, he should divorce her according to the
    Sunnah, which is to give one talaaq at a time when his wife is taahir (not menstruating)
    and he has not yet had intercourse with her following her period, or when it is clear that
    she is pregnant. According to the Shaafi’i madhhab and the majority of other
    madhhabs, giving three talaaqs at once counts as three separate talaaqs and is
    irrevocable, and the couple cannot remarry until the woman has been married to and
    divorced from another man. Other scholars say that three talaaqs given at once count as
    only one talaaq. 
    And Allaah knows best.