If the inspection/assessment process was able to pinpoint the source and cause of the mold growth, once that source is repaired, you can be relatively confident about the success of remediation. Ask if your restoration technician has the IICRC certification for "Applied Microbial Remediation. " You can also request a "post remediation mold clearance" from a third-party mold inspector to re-test the area for any remaining traces of mold before the area is treated with a sealer or encapsulant to resist future mold growth.