What is the repentance for someone who married fictitiously and obtained residency in a European country, and must he get rid of these documents, and is this act like taking usurious money, with its repentance being to dispose of the documents?

We have previously detailed the ruling on a sham marriage. If what took place falls under the second type of sham marriage mentioned in Fatwa No. 73311, then the contract is valid, unless it includes a condition that invalidates it. The woman is considered the man's wife, and she is not permitted to marry another man except after a divorce and the expiration of her 'iddah, if he had consummated the marriage with her. As for his repentance from lying and forgery, a Muslim is obligated to be truthful and just in his dealings with everyone. Deception or fraud to achieve a worldly purpose is not permissible, except in cases of extreme necessity. In this case, he is not obliged to inform the official authorities.