Is it permissible to lie when giving charity and helping the needy who refuse to take it, such as claiming that the money is a debt owed to the deceased or that they have won a certain amount?

Lying is forbidden and the root of wickedness. A person must accept a gift if it comes to him without asking or hinting. If others do not understand the matter, one may resort to indirect hints (ma'arid) and dissimulation (tawriya). If they cannot be convinced except by lying, then it is permissible at that point.