Is it permissible to accept the testimony of an open sinner?

Question:
Is the testimony and statement of an open sinner accepted?

Answer:
His statement is not accepted. Allah the Exalted said: meaning, verify it. But who is the open sinner? An open sinner is one who commits a major sin from the major sins, such as unlawful sexual intercourse, theft, drinking intoxicants, or consuming riba (usury or interest). One who commits a major sin from the major sins is the open sinner; this is a practical open sinner. There is also the open sinner in terms of belief, such as one who holds the beliefs of the Mu'tazilah, the Jahmiyyah, or those who deny the attributes. This is an open sinner in terms of belief, or one who holds the beliefs of the Khawarij, or holds false beliefs. This is an open sinner in terms of belief, so his testimony is not accepted. Yes.