Context: Requirements Technical Debt (RTD) emerges when software requirements are elicited, documented, or implemented in a way that deviates from stakeholders’ needs or quality standards. Despite its growing recognition as a key dimension of Technical Debt, there is a lack of comprehensive and empirically validated processes for RTD management. Goal: This paper proposes and evaluates the MANA-RTD process, a structured approach to manage Requirements Technical Debt throughout its lifecycle, integrating the process into an existing management platform, named DTRUST. The goal is to improve the traceability, prioritization, and repayment of RTDs in real software projects. Method: Supported by a literature review, the MANA-RTD process was proposed, and a case study was conducted in a government software project. The process was assessed using the SWOT technique and the Goal-Question-Metric (GQM) approach to analyze its effectiveness, usefulness, and suitability. Results: The application of MANA-RTD resulted in more systematic RTD management, with 50% of identified debts fully repaid, and improved documentation and monitoring practices. The results highlight the benefits of integrating structured RTD management into existing platforms, thereby enhancing visibility and decision-making. Conclusion: The MANA-RTD process demonstrated practical value and methodological rigor for managing RTD in real-world contexts, providing a foundation for future extensions and replications in other domains.