A fix that was never verified is a hope, not a control. After your team closes an issue, we re-test it the way an attacker would, confirm the exposure is gone, and give you written proof for stakeholders.
We take the original finding and your remediation notes, and plan the re-test around the real attack path.
We attempt the original exploit and common bypasses. Either the door is closed or it is not - we prove which.
You receive written validation per finding: what was tested, how, and the result - proof you can hand to any stakeholder.