Rules for leading prayers

It is haram to perform prayer behind these types of people:

1. One who is illegitimate
2. One who does not give the testimony of wilayat of Ameerul Momineen (as) in his prayer
3. One who has the disease of leprosy
4. One who is ignorant
5. One who is an oppressor
6. One who is not circumcised
7. One who is less knowledgeable than those praying behind him
8. One who does not do tabarra (disassociate) on the enemies of Ahlul Bayt (as)
9. One who is an enemy of Ahlul Bayt ( as)
10. One who is unknown by those praying behind him

Adopted from the book: "Kashaful Salat" by: "Seyyed Baqir Nisar Zaidi"