In the Castelli symposium on testimony in 1972 Ricoeur examines Heideggerian theme of Gewissen, the originary affirmation of Jean Nabert, and the ``glory of the infinity`` in Levinas with the title of three ``thinkers of testimony.`` But Ricoeur defines in Oneself as Another (1990) the essential role that attestation plays in the formulation of a hermeneutics of the self in relating to the semantic proximity of the German terms Uberzeugung (conviction) and Bezeugung (attestation), unddrlines the fundamental role of this notion of ``attestation``, ``the password for this entire book`` (Ricoeur 1990, 335). Ricoeur defines attestation as the "assurance of being oneself acting and suffering" or as the "assurance-the credence and the trust-of existing in the mode of selfhood." In this article I discuss the concept of attestation in Ricoeur`s philosophy in relation to the main dimensions of the self. I will examine each focus of this ellipse by asking in what sense these two notions arise out of a common hermeneutical problematic and describes the attestation of the self as a bridge between hermeneutics and ontology in the philosophy of Paul Ricoeur.