Despite the recent release of an update to the ANSI/IICRC S520 Standard and the IICRC R520 Reference Guide for mould remediation, we report on the potential for manipulation of published thresholds for the assessment of airborne and surface mould (viable and non-viable). We explore how this can result in buildings/areas being “passed” after remediation, despite mould levels remaining relatively high. We review the existing Australian Mould Guideline, AMG (2010) with the aim to tighten both the thresholds contained therein compared against other metrics, and the practical definitions for when to use what test, and how, and then interpret results to develop practical recommendations for cleanup/scope of works as required. We show using Industry reports, how tables of sample mould and indoor air quality results on a per building or area basis can be manipulated to semi-plausibly gain a “pass result” which one can hypothesise could be used to gain a financial advantage favouring the remediator, assessor or the insurer. We highlight how the unscrupulous use of different thresholds can present a misleading picture to the responsible authority (e.g. insurer) with regard to having satisfied the post-remediation clearance objective, whilst potentially failing on a fundamental health and safety basis for the occupants. We also show with examples how failing to provide adequate reference controls and under-sampling or misuse of equipment or media can lead to false positive clearance results or conversely how generating mixed and matched thresholds taken from diverse sources can lead to false conclusions (a "fail result") lacking in evidence or rigour. We highlight improvements to the AMG that should minimise under-sampling or manipulation of air or surface microbiology counts and/or taxonomic identification efforts used widely in aerobiology. Case studies are presented that highlight aspects of these problems and recommendations are given to improve the existing Australian Mould Guideline to better meet the needs of key stakeholders.