Add a Direct Deposit payment method.
So if a user selects it, it will have a message like this:
Please depostit your money to:
"Account Name: AliCommerce
Account BSB: 123-456
Account Number: 123456789
Reference Numebr: H3Z1G9
Amount: $120.00"
Where the first 3 lines are determined by the admin in the setup page, the reference number is automatically generated by the system, so that I as the store owner, when I look at my bank account balance, will see referece "H3Z1G9". I can then copy and paste it into the shopping module, which will say something like "Found 1 transaction with reference H3Z1G9, payment now accepted, transaction is now marked as paid"
Hope this explains it better.