I was asked to sign a paper containing a complaint against the imam for not attending; is my refusal to sign considered concealing testimony?

Question:
Honorable Shaykh, may Allah grant you success. He says: If one of the members of the mosque congregation asked me to sign a paper containing a complaint against the imam for not attending, he says: If I refuse to sign, am I considered to be concealing testimony?

Answer:
Yes, if testimony is required and you refuse, then you are concealing testimony. However, if you are not certain about this imam and what is said about him, do not sign. But if you know about it, then sign, because this is part of removing evil, as he is lax in leading the prayer and lax in the congregational prayer. This is a sinner, and it is not permissible to approve of him doing this. Yes.