Is an ignorant Muslim who commits a forbidden act exempt from responsibility, and does that affect the responsiveness of his supplication, especially if what he eats or drinks is forbidden and he is unaware of it?

A person is not excused for their ignorance of matters known necessarily to be part of the religion (such as the obligation of prayer and the prohibition of adultery), unless they are new to Islam or grew up in a remote desert. As for matters not known necessarily to be part of the religion, one is excused for their ignorance. Whoever engaged in prohibited transactions out of ignorance, and their prohibition was not well-known, bears no sin, and their supplications may be answered by Allah. If they become aware of the unlawfulness of the money, they must dispose of it by spending it on charitable deeds. Benefiting from the workplace electricity depends on the explicit or customary permission of the employer. Reading newspapers during work hours is not permissible if it leads to a disruption of work, and one must be cautious of newspapers containing forbidden images or promoting corruption. Leaving work for personal errands depends on the workplace regulations and laws. A Muslim must strive to learn the matters of their religion, because their aversion to seeking knowledge makes them inexcusable for their ignorance. The lifting of sin due to ignorance does not mean absolving the ignorant person from responsibility altogether, as the rights of others and the conditions of worship and transactions are not nullified by ignorance.