Simple Partnership Claim Lacks Standing for Partial Appeal

The court addressed an appeal by one of two parties who had jointly sued a third party for partial payment of an allegedly agreed-upon fee for managing an inheritance matter, after the initial claim was dismissed and the other original plaintiff acquiesced. The court determined that the relationship between the two original plaintiffs constituted a simple partnership under the Code of Obligations, as they agreed to work together for a common economic purpose, and absent any contrary agreement, claims against third parties belong jointly to all partners according to the law of undivided co-ownership. Consequently, the appellate court ruled that because claims belonging to a simple partnership must be pursued by all partners together—necessitating joint standing even in appeal proceedings—the sole appealing partner lacked the requisite active standing (procedural legitimacy) to pursue only a portion of the collective claim, leading to the dismissal of the appeal.