Is it permissible to work in accounting for advertising companies that deal with hotels, and that contain images and products related to alcohol and nudity, and does the ruling differ if one does not take payment for it?

If the two companies produce forbidden images, such as pictures of unveiled or naked women, or hold decadent parties, it is not permissible to work on their accounting records. This is because doing so constitutes assisting in sin, as Allah Almighty says: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression."