Know – o Muslim brother – that Allah has obligated upon all of the servants to enter into Islam and to hold fast to it and to warn against whatever opposes it. So Allah sent His Prophet Muhammad (sallallaahu ‘alaihi wa sallam) to call to that, and He, the Mighty and Majestic, informed that whoever followed him was indeed guided, and whoever resisted him was indeed misguided. So He warned in many statements concerning the causes for apostasy and the types of disbelief. So the scholars (rahimahumullaah) have mentioned in judgement upon the apostate that the Muslim apostates from his Religion due to many types of invalidators that make his blood and his wealth permissible and by that he leaves Islam. The most dangerous of these emanate from ten invalidators. 
We shall mention them for you in what follows upon a short path to warn you about them and so that you may warn others in hopes of security and well being, along with a small explanation after mentioning them.
First: From the ten invalidators is shirk (associating partners) in the worship of Allah. Allah the Exalted says:
“Verily Allah does not forgive that you associate partners with Him, but He forgives whatever is below that for whoever He wishes.” [Sooratun Nisaa` 3:116]
Allah the Exalted says:
“Whoever associates partners with Allah, then Allah, then Allah has forbidden Paradise for him and his dwelling be in the Fire and there will be no helpers for the oppressors.” [Sooratul Maa`idah 5:72]
So from that is supplication to the dead and seeking their aid and taking oaths by them and slaughtering for their sake.
Second: Whoever places intermediaries between himself and Allah, supplicating to them and asking them for intercession and placing his trust upon them, then he has indeed disbelieved by agreement.
Third: Whoever does not disbelieve in the idolaters, or doubts in their disbelief, or believes in the correctness of their religion, then he has disbelieved.
Fourth: Whoever believes that the guidance of other than the Prophet (sallallaahu ‘alaihi wa sallam) is more complete than his Guidance, or that the judgement of other than him is better than his Judgement, such as those who give precedence to the judgement of the tawaagheet  over his Judgement, then he is a disbeliever.
Fifthly: Whoever hates something from what the Messenger (sallallaahu ‘alaihi wa sallam) came with, or the one who acts like that, then he has indeed disbelieved due to the statement of Allah:
“That is because they disbelieved in what Allah revealed, so He rendered their deeds worthless.” [Sooratul Muhammad 47:9]
Sixth: Whoever ridicules something from the Religion of the Messenger (sallallaahu ‘alaihi wa sallam), or its reward, or its punishment, he has disbelieved. The proof for this is the statement of Allah:
“Say: Was it Allah and His messenger and His Signs that you were mocking? Make no excuse, indeed you have disbelieved after your faith.” [Sooratut Tawbah 9:65-66]
Seventh: Magic, and from it is sarf (detachment)  and ‘itf (affection) . So whoever does this, or is happy with it – he has disbelieved. The proof is the statement of Allah:
“And they do not teach anyone until they have said: ‘We are a trial so do not disbelieve.’” [Sooratul Baqarah 2:102]
Eighth: Supporting the disbelievers and cooperating with them against the Muslims. The proof for this is the statement of Allah the Exalted:
“So whoever forms an alliance with them, then verily he is from them. Verily Allah does not guide an oppressive people.”  [Sooratul Maa`idah 5:51]
Ninth: Whoever believes that some of the people are free to leave from the Law (Shari’ah) of Muhammad (sallallaahu ‘alaihi wa sallam), then he is a disbeliever due to the statement of Allah the Exalted:
“Whoever seeks a religion other than Islam, it will never be accepted from him, and in the Hereafter, he will be from the losers.” [Soorah Aali Imraan 3:75]
Tenth: Turning away from the Religion of Allah without being knowledgeable about it, nor acting upon it. The proof for this is the statement of Allah:
“And who is more unjust  than one who is reminded  of the statement of his Lord, then he turns away  from them. Verily We will take retribution  from the criminals.” [Sooratus Sajdah 32:22]
So all of these invalidators do not differentiate between the scoffer or the liberal person or the fearful, except that it is deception. All of them are from the greatest danger and most numerous in occurrence. So it is befitting for the Muslim that he is aware of them and fears them for himself.
Whoever believes in the constitutions and laws that the people take as being better than the Law of Islam, or that the Laws of Islam cannot be applied in the twentieth century, or that they are a cause for division amongst the Muslims, or that it restricts a persons devotion to his Lord without entering into the matters of the Next Life. Also entering into the fourth category is whoever thinks that the Ruling of Allah in cutting the hand of the thief or stoning the adulterer is not valid in this age. Also entering into that is whoever believes that it is permissible to rule by other than the Law of Allah in conduct and punishments or other than them.
We seek refuge in Allah from that which necessitates His Anger and His Grievous Punishment. May the Prayers and Peace of Allah be upon the best of His creation, Muhammad and upon his family and his companions.
[By: Imam ‘Abdullaah Ibn ‘Abdul ‘Azeez Ibn Baaz|Translated by Maaz Qureshi 
 This is a slightly abridged translation of ‘al-’Aqeedatus Saheehah war-Risaalatul Ma’iyyah’ (a collection of four booklets by the al-’Allaamah Ibn Baaz) (p.37-41).
 The shaykh, the Imam, Muhammad Ibn ‘Abdul Wahhaab and other than him from the people of knowledge have mentioned all of these. Translators Note: See: Durarus Sunniyyah (8/89-90), and Mu`allifaatush Shaykh Muhammad Ibn ‘Abdul Wahhaab (5/212/214).
 Translators Note: Imam Ibnul Qayyim gave a general definition for taaghoot (pl. tawaagheet) when he said [Fathul Majeed (p. 16)]:
“A taaghoot is everything that a slave transgresses the limits by, such as a deity, or someone who is followed, or calls to his following. So a taaghoot is every people who subject judgement to other than Allah and His Messenger, or worship from other than Allah, or obey without Guidance from Allah, or those who obey him in what is not known as obedience to Allah.”
 Sarf: A magical action by which it is intended to distance a man from that which he wants, such as detaching a man from the love of his wife to hatred for her.
 ‘Itf: A magical action by which it is intended to encourage a man towards what he does not want through Satanic paths.
 This means, none is more oppressive than them.
 That is, the disbelievers.
 Reminder: an admonition and insight into what is obligatory upon him.
 Turning away: rejecting alliance.
 Retribution: taking back what was done before.