An agreement without consideration is void according to Indian contract law, with three exceptions: 1) if it is in writing, registered, and made due to natural love and affection between parties in a near relation, 2) if it is a promise to compensate someone who voluntarily did something for the promisor that they were not legally required to do, or 3) if it is a promise to pay a time barred debt. The document then discusses these exceptions in more detail through examples and case law citations.