First of all, I am not a muslim and thus do not know much about Islam, but I am reading a book from Tayeb CHOUIREF, L'Islam expliqué (Islam Explained, march 2022) and reached the part about zakât.
Somewhere in the book, the author says that there is no official authority in Islam. By that, I mean any official, like the Pope for the christians, that gives orientation on how Islam should be practiced (not the corrects words, but I think you'll get the idea).
This absence of authority is for all Islamic orientations but Shiite, if I remember well.
However, when explaining what zakât is, the author says that it is given to poor people, or to those responsible for collecting donations.
- Who is in charge of collecting it ?
- How are these people selected ?
- How do you make sure the collected donations are actually distributed to those needing it ?