Some scholars therefore call this category “abandoned,” saying, for instance, “His ḥadīth is abandoned,” or, “So-and-so is abandoned in ḥadīth.”

Ruling on one accused of lying
If such a person repents, his repentance is judged sound, and clear signs of truthfulness appear in him, it becomes permissible to accept ḥadīth from him.

Ruling on one who lies only rarely
A narrator who only seldom lies in ordinary speech, never in prophetic reports, is not thereby branded as the transmitter of a fabricated or abandoned ḥadīth—though the lie itself remains a sin.

3 – Flagrant Disobedience (fisq)
By fisq here we mean open sinfulness in practice, not in creed; doctrinal deviance falls under bidʿa (innovation), a term most often applied to matters of belief. Although lying is technically a form of fisq, the critics treated it as an independent ground for censure because the reproach attached to it is particularly severe.

4 – Unknown Narrator
Anonymity of the transmitter is likewise a reason to impugn a report, for when he has not