How can I document partial payments in invoices for Australian laws?

[TraceyG]

Hi, appreciate any guidance here.

I'm located in Australia and by law we need to be able to provide a document (a receipt or an order email) to customers that shows if they've made a partial payment - how much that partial payment was against the whole order value, and ideally the remaining amount.

Any guidance on how to do this? For both online and POS orders?

Many thanks in advance!