Chofetz Chaim Daily 16 Taamuz 4:11 One seeking info about a potential shidduch/partner may ask others, and they may say necessary info (See rechilus Chap. 9 for more detail). However you must explain why you are asking so it will be with proper intention. One MAY NOT ask those who do not like the subject.
Thank you Rabbi Yehuda Cahan for the following clarification regarding yesterdays segment:
According to contemporary Halachic authorities, even if the subject is a sinner, they will most likely be classified as a “Tinok Shenishba” e.g. someone who didn’t receive a proper Jewish education, or did, but has unfortunately had negative life experiences beyond their control. Therefore one may not defame them no matter what the circumstances. As with all Lashon HaRa questions, in case of doubt one should seek the advice of a Rav.