Improper gains refer to gaining benefits without a a legal and contractual basis and causing others to suffer losses. According to the law, the party that has suffered a loss has the right to request the improper gainer to return the benefits obtained. Obligation to return benefits. Which of the following are improper benefits? ['Debtors settle outstanding debts.', 'The customer pays the salesperson more.', 'Alimony from the foster child.', 'Pay for money lost as a result of gambling.']