Which role confirms if a user story can be accepted based on acceptance criteria?

The role that confirms if a user story can be accepted based on acceptance criteria is the Product Owner. This is because the Product Owner is responsible for defining and refining the features and requirements of the product, ensuring that the development team has a clear understanding of what needs to be delivered. They establish the acceptance criteria for each user story, which provides a basis for evaluating whether the work meets the necessary standards and can be accepted.

Once the development team completes a user story, the Product Owner reviews the implementation against the defined acceptance criteria. If the user story meets all of those criteria, the Product Owner can confidently accept it as complete. This role acts as a bridge between stakeholders and the development team, ensuring that the final product aligns with business goals and user needs.