[GAIUS libro secundo de uerborum obligationibus. ] §46.3.106.prAliud est iure stipulationis Titio solui posse, aliud postea permissu meo id contingere.
[GAIUS, in the second book on verbal obligations.] It is one thing for payment to be capable of being made to Titius by the right of the stipulation, and another for this to happen afterwards by my permission.
nam cui iure stipulationis recte soluitur, ei etiam prohibente me recte solui potest: cui uero alias permisero solui, ei non recte soluitur, si, priusquam solueretur, denuntiauerim promissori, ne ei solueretur.
For in the case of one to whom payment is rightly made by the right of the stipulation, payment can be rightly made to him even if I forbid it; but in the case of one to whom I have otherwise permitted payment to be made, payment is not rightly made to him if, before it was made, I had notified the promisor that payment should not be made to him.