Flame tree – An owner can inspect the Body Corporate records in Qld. If you want to inspect a lot of ‘old’ receipts then I suggest that you physically attend the Body Corp Manager’s office to do this:
https://www.qld.gov.au/law/housing-and-neighbours/body-corporate/records/access-records
There are Codes of Conduct for both Committees and Strata Managers in the Qld legislation. Hidden commissions would not be permitted.
The Strata Manager’s and Service Contractor’s Code of conduct is here:
http://www5.austlii.edu.au/au/legis/qld/consol_act/bcacma1997388/sch2.html
Clause 10 states:
10 Goods and services to be supplied at competitive prices
A body corporate manager or caretaking service contractor must take reasonable steps to ensure goods and services the person obtains for or supplies to the body corporate are obtained or supplied at competitive prices.