Method Of Tajdid-ul-Iman (i.e. Becoming Muslim Again)

Repentance from Kufr will only be acceptable when the individual considers that Kufr to be Kufr, and feels hatred and displeasure for that Kufr in his heart. The Kufr that was committed should also be mentioned in repentance. For example, if someone wrote on a visa form that he is a Christian, he should say the following,‘O Allah عَزَّوَجَلَّ I repent of the Kufr of declaring myself as a Christian on the visa form.’ After repenting, recite:

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لَآاِلٰہَ اِلَّا اللہُ مُحَمَّدٌرَّسُوْلُ اللہِ صَلَّی اللہُ تَعَالٰی عَلَیْہِ وَاٰلِہِ وَسَلَّم

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(There is none worthy of worship but Allah;

Muhammad صَلَّی اللہُ تَعَالٰی عَلَیْہِ وَاٰلِہِ وَسَلَّم is the Prophet of Allah عَزَّوَجَلَّ

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In this way, not only the repentance from that particular Kufr will be done but Tajdid-ul-Iman (i.e. the act of becoming a Muslim again) will also be done.

مَعَاذَاللہ عَزَّوَجَلَّ if someone has uttered several words of Kufr and he doesn’t remember what things he has said, he should say the following, ‘O Allah عَزَّوَجَلَّ! Whichever words of Kufr I have uttered, I repent from them all,’ and then recite the Kalimah. (In the case of knowing the translation of the Kalimah, there is no need to mention the translation by tongue.)

If someone doesn't know whether what he has uttered was Kufr or not, but he still wants to repent as a caution then he should say the following, ‘O Allah عَزَّوَجَلَّ! If I have ever committed any Kufr, then I repent of it.’ After saying this, he should recite Kalimah. (Everyday, in fact from time to time, everyone should keep repenting as a caution.)