The dative case in Vafsi appears in three structures: (a) the case of the experiencer in sensory verbs, (b) the case of the indirect object (IO), and (c) the case of the object of the preposition /da/ (to), or the preposition /az/ (to), or the enclitic /-o/ (to), or the object of the postposition /rā/ (for). In Vafsi, as in many other Indo-European languages, sensory verbs necessitate the emergence of quirky subjects which have the experiencer function and are dative case marked. In order to analyze the dative case marking in Vafsi using optimality theory, this article uses the faithfulness constraint of faith-lex and the markedness constraint hierarchy of *ERG≫*DAT≫*ACC≫*NOM. Vafsi always allocates the dative case to the IO of the ditransitive verbs. This phenomenon is illustrated by use of an optimality theory (OT) tableau. Some Vafsi ditransitive verbs dative case mark the IOs using adpositions. If so, Vafsi differential adpositional case marking (DACM) will rule, as the IOs are objects of adposition (OAs) simultaneously.
