Informing someone of a sin he committed accidentally

Hi,

A man asked about a transgression he and his wife had committed unknowingly, and which he had now discovered. He wanted to know whether he should tell his wife, so that she could repent.

The rule is that accidental sin does require atonement, and therefore he should inform his wife, so that she will have the opportunity to atone.

(Rav Moshe Feinstein, Igrot Moshe Orach Chaim 1:175)

המצפה לישועה,
Mordechai