If someone performs righteous deeds,

A: In addition to performing sincere Tawbah, the man has to return people's rights or ask for their forgiveness, as people’s rights cannot be waived unless they relinquish them. (Part No. 15; Page No. 367) As for the money due to the people he does not know, he has to give it as Sadaqah (voluntary charity) on their behalf. He also has to perform the Hajj that he is obligated to do on behalf of others or return the money to them and tell them the truth. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.