Hakim al-Umma Shaykh Mawlana Ashraf ‘Ali Thanawi (may Allah have mercy on him) said,
“People request permission (ijaza) for reciting ‘Dalail al Khayrat’ from the piously elders (shuyukh). There is faulty intention in doing so. They beleive that reciting it without permission will be without any blessings (baraka). Most likely, the system of acquiring permission was initially developed to make sure that the wordings of the text were correctly transmitted. While giving the permission the Shaykh used to listen to the recitation and made any corrections needed.
In fact, the text that is worthy of being recited from the pulpit what has it to do with this intimate secrecy (of considering it essential to acquire an individual permission for its recitation).
If someone ask’s me regarding the recitation of ‘Dalail al Khayrat’, I tell him to (recite, but) leave the recitation of the statements that say, The Prophet said (قال النبى صلى الله عليه وسلم). This is because few of the Prophetic sayings (hadith) in it are fabricated (موضوع). Apart from this, its subject matter is completely accurate.”
Majmua e malfuzat: al-Kalam al-Hasan, 106