4:1 Asur to degrade someone about their parents negative actions, or their own past misdeeds. Even if someone is actively doing something wrong bein adam laMakom, asur to tell anyone about it. 4:2 Asur even if its a slight wrongdoing i.e. not keeping a minhag etc. [website]
3:7 One is obligated to judge his fellow favorably as it says, Bitzedek tishpot amisecha, often, not doing so leads to LH (see sefer for more detail). 3:8 Even in scenario that one isnt obligated to judge favorably, one still must not relate what he saw, unless all the conditions are met. See chapters 4, 5, & 10. [website]
3:5 Asur to say LH in a sneaky fashion, i.e. to make believe one doesnt realize that what hes saying is negative, or that ploni acts this way 3:6 Asur to say LH even if you know in advance that it wont cause any harm to the subject. [website]
ChofetzChaimDaily 8 Adar 3:3 Asur to degrade someone even if said as a joke. 3:4 Asur to say anonymous story, if the listener will be able to discern who youre saying bad about. Asur to cause a negative impression about somebody, no matter how you accomplish that. [todays-halachos]
ChofetzChaimDaily 18 Cheshvan 5:2 Asur to tell people that ploni is weak or not smart etc. because this will damage him socially and financially. 5:3 See sefer for more details. 5:4 Worse to say that ploni isnt such a scholar; e.g. if hes a Rabbi, it will damage his spiritual influence and livelihood. If hes a new yungerman, it will
ChofetzChaimDaily 17 Cheshvan 4:12 To repent for LH one must ask subject mechila (only if he was hurt; socially, emotionally, etc.) Its impossible for a habitual LH speaker to ask mechila from everyone he pained. 5:1 If you see someone doing sin bein adam lachaveiro, (ex. Not lending money that he could afford) you must not tell anyone.
ChofetzChaimDaily 30 Tishrei 2:1 The sin of LH increases with amount of people listening to you speak it. 2:2 Something that can be understood as neutral or slightly negative; is mutar to say, if you say it before three people, since its obviously going to get back to the subject, the speaker obviously isnt intending for the negative interpretation.
ChofetzChaimDaily 17 Elul 9:1 If you know bad things about the ploni that R wants to enter partnership with, you must tell R, provided that you fulfill these conditions A. its definitely destructive to partner B. must not exaggerate C. must intend ltoeles (be sure that R will actually take your advice) D. seek alternative methods first E. it cant
ChofetzChaimDaily 16 Elul 8:4 Rechilus is asur even if the comment ploni made wasnt so bad, ex. When Sarah said and my husband is old Hashem didnt repeat that part to Avraham. 8:5 if someone tells you a secret, you may not repeat it, it can damage him and isnt derech tznius.