Is it permissible to give charity from one's money with the intention that its reward goes to the people whom the father stole from in his youth, so that this sin may be removed from the father, without informing him of this to avoid problems and embarrassment?

Whoever steals money is obligated to return it to its owner or seek their forgiveness. If the owner is unknown, the money should be given in charity on their behalf. If the owner is found at some point, they should be given the choice between affirming the charity or taking their money back. If the thief is unable to repay, the money remains a debt on their conscience. Charity is not sufficient if it is possible to reach the owner of the money. It is permissible for you to pay off your father's debt and give the money to the owners or donate it in charity without his knowledge, because it is a debt owed by him, and it is permissible to pay off someone's debt on their behalf without their knowledge, as their intention is not a condition.