Nullifiers and Invalidators cancel out one’s Religion, Tawheed and Eeman, just as the nullifiers of Purity cancels out one’s state of purity. So if a person has just performed wudoo (ablution) and is in a state of purity, then he breaks his wudoo by urinating, defecating or passing wind, his state of (ritual) purity has been nullified and invalidated and he goes on to being in a state of (ritual) impurity after having been in a state of purity. Such is the case with the Muslim, the believer and the one who affirms Tawheed (Muwahhid) – if he commits any of these Nullifiers of Islam, his Islam and Religion becomes invalidated. If he or she dies while in this condition of Nullification, he or she will then become from the inhabitants of the Hellfire. 

Studies in the Explanation of The Invalidators of Islaam explains the book of the Mujadid ash-Shaykh Muhammad ibn Abdul Wahhab (Rahimahullaah ta'alaa) . It is explained by ash-Shaykh Saalih al-Fawzaan (Hafidhullaah) in a way that only he can explain it, The book is transcribed for the Shaykh's many duroos on the book and is printed by our Brothers at Darul Imaam Ahmad in two colors on yellow paper. The book consist of 230 pages.