Under Australian GST rules the party receiving a supply can issue the tax invoice instead of the supplier, provided both sides agree in writing. Aggregators use this arrangement because they, not the broker, know exactly what commission the lenders paid. The result is the RCTI: a statement generated by the aggregator that doubles as the broker's tax invoice for the commission earned.
An RCTI lists each loan's commission line for the period: the lender's gross payment, the aggregator's share, and the amount paid to the broker, usually shown ex-GST and inc-GST. It also carries the negative lines, clawbacks and fee deductions, and often a summary of new settlements, discharged loans and loans in arrears. Most aggregators export it as a spreadsheet, and that spreadsheet is what MyLoanBook reads.
The RCTI is the only complete record of a broker's trail income, which makes it the right document to reconcile every month and the one a buyer will ask for when valuing the book.