The article discusses how legal systems require proof of loss, harmful act, and causality for litigation. While modern jurists aim for complete compensation for damages, not all losses can be compensated. The concept of indirect loss, also known as intermediary loss, is crucial in civil liability law. Iranian law, influenced by French civil law, does not typically compensate for indirect damages. The author argues that removing the limitation on compensating only direct losses would not harm the legal system's structure. The key idea is that a clear causal relationship between harm and the harmful act should be established for compensation.