Resumen: Starting from a general vision of Roman law regarding obligations, this article analyzes the relationship between the exact fulfillment of the former and the creditor satisfaction. In addition, based on the sources, some personal reflections are made as for the procedural claim in case of non-compliance, the payment made after the litis contestatio, and a review of the means of proof in the Roman private process in the Italian doctrine. Idioma: bul Año: 2021 Publicado en: Ius Romanum (Sofiâ) 2021, 1 (2021), 280-308 ISSN: 2367-7007 Originalmente disponible en: Texto completo de la revista