Article 987. Unjust enrichment due to actions in another's interest.
If actions that are not directly aimed at ensuring the interests of another person, including in the case when the perpetrator mistakenly assumed that he is acting in his own interest, led to the unjust enrichment of another person, the rules provided for by chapter 60 of this Code shall apply.
References to other articles of chapter 50. Actions in another's interest without instructions: