Shafaqna (Shia International News Association) – The Grand Ayatollah Sistani answered some questions regarding Ethical Issues. According to Shafaqna the question and answer are as follows:
Question 1: A person has entered a country as a visitor and his passport was stamped that he was not allowed to work. If he works illegally and gets the money ‘under the table’, is it halal?
Answer:If the visa was granted against an undertaking that the person should not engage in any sort of employment during the period of his stay in the country, his infringement of the undertaking is haraam. However, this should not deny him the wages for the work; it is permissible that he has the right of disposal over it as he deems fit.
Question 2 : Is it permissible for a Muslim to give false information to government departments in Europe to gain some financial or abstract benefits, through proper channels?
Answer: It is not permissible because it is lying.
Source: Ayatollah Sistani