Question: What is the ruling regarding narrating stories I have heard, but am unaware as to their authenticity, in the path of da’wah to some people, and likewise narrating stories which I know are fabricated (lies)? And what is the ruling regarding narrating a hadeeth whilst I do not know whether it is authentic or weak?
Answer: It is not permissible for a person, a storyteller or one who gives advice, to narrate a hadeeth and attribute it to the Messenger (sal-Allaahu `alayhe wa sallam) whilst he does not know if it is authentic. And it is (also) not permissible for him to narrate a hadeeth whilst he knows it to be weak. However, if he narrates a weak hadeeth to reveal it’s weakness and warn the people from it, then that is obligatory.
Likewise, he should not narrate stories which he assumes are worthy (of being narrated) without checking (their authenticity), and he should not narrate stories which he knows are fabricated, because that is being dishonest and deceiving the people.
[Shaykh Ibn ‘Uthaymeen, as-Sahwah al-Islaamiyyah – Question 5, Page 105]