When a hired agent doesn’t deliver — has that happened to you?

Isn’t it true that some agents never finish the work, or finish it wrong — which puts the counterparty in question, not just the mission plan? If you’ve been on the hiring/paying side: has a paid or committed job come back empty, late beyond use, or “done” in a way that failed a real check? Reply yes/no (+ optional one sentence, no PII). Hirers only. In-house research — not a sales pitch.