The last invoice should not be signed off by the person sending it
Remediation ends with a judgement: is this building clean and dry enough to close up. It is the moment with the most money attached and the least visibility, because by the time anyone could check, the containment is down and the drywall is back. Florida has already decided who should not be making that call, and the answer is the same people who were paid to do the work.
A clearance test you cannot fail
Clearance is the only stage of a mold job with a defined outcome, which is exactly why the independence of whoever issues it matters more here than anywhere else. A clearance that comes from the contractor being paid for the work has a predictable result.
Florida takes the same view in statute. Section 468.8419 bars a remediator from performing a mold assessment on a structure they remediated within the previous twelve months, and bars an assessor from remediating one they assessed in the same window. The clearance test is an assessment. The bar applies to it.
The other half is the criteria. A clearance test is not a general opinion that things look better: it is a comparison against a written protocol produced before the work started, naming the affected materials, the removal lines, the containment specification and the numbers that constitute a pass. Where no protocol was written, there is nothing to verify against and clearance becomes a matter of taste. That is also why we issue protocols on the inspections that need them, for other people's work.
And the sequence is not negotiable: inside the containment, before it comes down, before anything is rebuilt. Once the barriers are removed the air in that space is the air of the whole building, and a sample from it establishes nothing about whether the work area was clean. Re-erecting a containment to test properly costs a great deal more than testing in the right order, and being asked to clear a finished, painted room is the single most common way this goes wrong.

What the job covers in Fort Lauderdale
What we cover
Verification of a completed remediation: visual inspection inside the containment, moisture verification of the remaining materials, and clearance sampling against the outdoor control.
What you get
A pass or a fail against the written criteria, with the specific reasons in either case, issued before the containment comes down and before the finishes go back.
Decision point
Whether the job is finished. That answer is worth nothing if it comes from the people being paid for the job.