At Athens legislation that made private agreements enforceable rested not on the binding effect of promises per se but on a principle of closure, modeled on the Reconciliation of 403.
Modern and Classical Languages
Copyright the author. Published in Greek, Roman and Byzantine Studies under Creative Commons Attribution 3.0 Unported (CC BY 3.0)
Carawan, Edwin. "The Athenian law of agreement." Greek, Roman, and Byzantine Studies 46, no. 4 (2006): 339-374.
Greek, Roman and Byzantine Studies