Here is the Precondition that i m refering to {i thought this way it will be more beneficial and understandable for u}
This is chapter 32 of the Rimah of Shaykh Umar Futi, regarding the prerequisites for entering this Tariqa. These prerequisites did not come later but came from the dictation of the Holy Prophet to Shaykh Ahmad Tijani which is dictated in the Jawahir al Maani (of Sidi Ali Harizim), the Kitab al Jami (of Sidi Muhammad al Mishri), and other compilations of text from other companions and contemporaries of Sidina Shaykh Ahmad Tijani.
2. The applicant for instruction must not be equipped with any of the litanies (awrad) of the Shaykhs that are essential to their Spiritual Paths, or if he has acquired one of them, he must detach himself from it and never go back to it. We are told in the Jawahir al Ma'ani:
"As you should know, this sublime litany must not be taught to someone who is equipped with one of the litanies of the Shaykhs (may Allah be pleased with them), unless he abandons it completely and swears to Allah that he will never return to it. Only then may he be taught the litany, and only by someone who has special permission from the Shaykh (may Allah be pleased with him). This is not a form of arrogance on our part, nor a claim of superiority over the Shaykhs--far be it from us, and let us take refuge with Allah! All the litanies of the Shaykhs are based on right guidance and clear proof from Allah, and each of them is a path and a means of access to Allah. This condition is stipulated only in our Spiritual Path, not any other. If someone wishes to enter our Spiritual Path, he is therefore bound to fulfill this stipulation. He then has nothing to fear from his companion, nor from anyone whomsoever, among the saints, the living and the dead, in this world and the Hereafter. He is safe, so no harm will afflict him, not in this world, not in the Hereafter, not from his Shaykh, and not from Allah and His Messenger (Allah bless him and give him peace), on the strength of a true promise that cannot be broken."
I have posted only one precondition there r many.
May ALLAH guide u to the right.
Salaamun Alykum