What is the ruling concerning the amount paid by a customer for an item he did not receive, knowing that the accountant is aware that it will be deducted from him if he defrauds the customer, and can the accountant give that amount in charity to atone for his deed?

It is forbidden for an accountant to defraud a client or charge him for something he did not request. This is considered injustice, deception, and unlawfully consuming wealth. The accountant must repent to Allah, and part of this repentance is returning the amount to the client. If returning it is not possible, he should give it as charity on the client's behalf. Whoever seizes what is not rightfully his, must return it to its owner. If this is not possible, he owes it as a debt. If that is also not possible, he should return it to the client's heirs. If that is not possible, he should give it as charity on the client's behalf.