One receipt can cover more than one invoice
The example receipt is A$500 for C-A. Allocating A$300 to INV-01 and A$200 to INV-02 uses the entire receipt. INV-02 retains an arithmetic A$200 balance. C-B’s A$90 invoice is excluded. Equal totals are a consistency check; they do not show which invoice the customer intended to pay.
Use the remittance, not a guessing rule
Read the customer’s remittance and verify the actual receipt before entering allocations. The checker does not choose oldest invoices automatically or search combinations that happen to total the receipt. Unknown invoice references and repeated allocation rows are rejected. Allocating above either the receipt or an invoice balance produces a review warning.
Record payment separately after checking
Use the existing payment-record process only after confirming the references and amounts. This helper neither marks an invoice paid nor connects to a bank. Download the check table as a review record if useful. If a new invoice is needed for different work, open the original invoice tool; do not create another invoice merely to represent a receipt.
Keep a review record
Run the check again whenever an input changes. Invalid or incomplete input clears the previous live result and disables download, so an old answer is not presented as current. Downloads contain the check table only; they are not a tax invoice, payment receipt or successful invoice export. They do not update drafts, history, login or payment status.
business.gov.au: invoicing and payment records · Reference for the underlying recordkeeping or calculation concept; not an endorsement of this helper.