The topic of contract modifications: adaptation and flexibility in commercial relationships focuses on the importance of adjusting contractual agreements to adapt to unforeseen changes or changing situations or force majeure in the business environment or a State entity. The primary objective is to preserve the effectiveness and equity of the original agreement, thus ensuring the continuity of commercial relations in a fair and efficient manner. The results of this study are framed in contributing to the effective management of Business and/or State risks, in order to identify, estimate and value them to prevent the public interest of the State and the Contractor's Assets from being lacerated by these events. In conclusion, addendums or modifications to contracts with clients are vital to maintain flexibility and adaptability in business relationships. By ensuring ongoing compliance and adapting to changing needs, the State can build strong and effective relationships with its customers. The ability to modify a contract reflects the flexibility and adaptability needed in a dynamic business environment. It is essential that the contractual modification process is clear, transparent and collaborative to ensure that all parties are informed and committed to the proposed changes.