creditive
/ˈkrɛdɪtɪv/adjective
Philosophy and Theology (a) Having the attribute of believing; capable of belief; (b) of or relating to belief; of the nature of belief or intellectual assent.
noun
Diplomatic. A credential letter. Compare credential. Now historical and rare.
Origin
Mid 17th century (in an earlier sense). From post-classical Latin creditivus that gives credence, that believes from classical Latin crēdit-, past participial stem of crēdere to believe + -īvus.