Define success before making changes
Describe the behaviour that should change, the affected scope, and the acceptance criteria. Keep those criteria linked to the original finding so everyone understands why the work exists.
Reproduce the original problem
Where possible, record a safe reproduction in an agreed test environment. That gives the team a concrete way to check whether the proposed change addresses the observed issue.
Check related behaviour
A fix may affect neighbouring flows. Changes to permissions, for example, need checks for both access that should be denied and access that should remain available. Choose regressions based on the change.
Record what was verified
Capture the version, environment, checks, and results. If something remains untested, say so. Another engineer should be able to understand the basis for closing the finding.
Keep the record useful
Link the finding, implementation, and verification evidence. That trail helps future maintainers understand the decision and gives release reviewers context for later changes.