Jus quaesitum tertio – this legal phrase comes from Latin. It literally means “a third party right of action”. In the legal practice, it applies in the Law of Contracts in some legal systems. There it details the rights established into an agreement in favor of third parties (that are not part of this agreement). It should be obeyed that in many jurisdictions third parties can only acquire rights and not to be burdened with any obligations. For example, two people conclude a building contract to construct a house, which property  then won’t go in the possession of the assignor (who pays the price towards the builder) but will be given to their children. Another example is if a creditor and debtor agree in the loan contact that the payment of the debt will be made not directly to the creditor, but to a third party chosen by the creditor. These contracts are called “third party beneficiary contracts”. As seen from above, usually the third party only acquires rights and does not undertake any obligations. Because you cannot be obliged towards somebody with a contract which you have never signed or even seen.