Explain article 22 and 23 and site examples:https://www.ilo.org/dynatlex/docs/ELECTRONIC/50160/102475/F1500145909/PHL50160.pdf

Article 22. Every person who through an act of performance by another, or any other means, acquires or comes into possession of something at the expense of the latter without just or legal ground, shall return the same to him. Article 23. Even when an act or event causing damage to another's property was not due to the fault or negligence of the defendant, the latter shall be liable for indemnity if through the act or event he was benefited