What is the ruling on compensations received from the United Nations resulting from forged documents, and is it permissible to eat from them or to take a portion of them for the needy, and is it permissible to eat and drink in the recipient's house?

The UN reparations are taken from the Iraqi people's account. Therefore, it is not permissible to take them except for one who has sustained actual damage, and only to the extent of that damage. It is better to leave them due to doubt. Whoever takes their due share from it is permitted to benefit from it. If your cousin has taken what he is entitled to, then you are permitted to take the amount he promised you; otherwise, not. Forging documents is deception and fraud, unless it is necessary to prove a right or repel injustice. If most of your cousin's money is unlawful, then it is not permissible to eat or drink from his provisions unless you are predominantly certain that what you are eating or drinking is from a permissible source. However, if lawful and unlawful are equal, or lawful predominates, then eating and drinking are permissible.