What is the ruling on working to repair a car that has been in an accident, while providing the customer with a pricing document so that he can claim compensation from the insurance company, knowing that insurance is mandatory? Is it permissible to refuse to provide the pricing document to avoid sin, despite the need for work?

Working in car repair and writing a pricing document is permissible. The ruling does not change if the person requesting the document intends to use it with a commercial insurance company, as this concerns the car owner and does not make the permissible work unlawful. The worker should advise against dealing with forbidden insurance companies.