completely renounce their sin in order to become a member.
What sin? My husband & I attended a Dutch Reformed Church for a short time when we had not learned doctrine yet. We saw reformed and thought it would be as the teaching of R.C. Sproul on the radio. Ha, ha, ha. Babes. Anyway, all we heard was God loves you. But John the Baptist, then Jesus preached again & again, Repent! The true message of salvation has not changed. Repent and believe. There is no salvation without repentance. You are correct in saying that to be a member (of the true church) repentance is required.