Dought & clear, - Rulings on Tawbah, - Repentance From Sins Involving the Rights of Others.

If the sin involves the rights of another personthen what form should
repentance take?
Praise be to Allah.
The basis for the answeris the hadith of the Prophet (peace be upon
him) who said: "He uponwhom his brother has a right, be it of the
nature of money or honor, let him compensate for it before he is made
to compensate for it on a day when there will be neither dinar nor
dirham to deal with. Instead, if he has a good deed in his account it
will be taken away from him and given to the person he had wronged.And
if he has no good deed in his account, sins of the other person will
be taken from him and added to his account" (al-Bukhari). Accordingly,
the repentant can escape the questioning only by either giving back
the people wronged their due or seeking their forgiveness. If they
forgive, he need not worry, but if they do not, then he must return
their dues.
And Allah knows best.