I have a family member who is a teacher. She worked for a school for many, many years. A few years ago, something happened in the school, and a number of teachers were told they wouldn’t be returning the next year, or some left on their own, including my relative.
After this happened, the school stopped paying them for the rest of the school year. It wasn’t because of a lack of funds, it was because they knew they didn’t need them back the next year (this was proved).
A number of teachers went and called the school administrator to a din Torah. He never showed up. The beis din gave them permission to go to court over the matter, and they filed a lawsuit.
In my relative’s case, the amount owed is in the tens of thousands of dollars. She did not join the lawsuit because she felt it was wrong. The people controlling the money never asked for forgiveness.
How can you forgive someone like that? Who knowingly does wrong, and continues to do so? In such a case, there is no chiyuv to forgive, but still, you’d like to forgive those you don’t have to. In this case, I don’t know how it can be forgiven.