In iBex multiple invoices can be made for the same booking.
Here is an example:
This booking has three rooms.
There are also three extras.
The three guests will be checking out and paying separately.
The first guest, Mr Haverford, would like to pay for his room (room 1) and the extra Tea (ordered from the bar earlier). He would like an invoice.
1. Go to the Finance tab and open Invoices
2. Select just his room and the Tea extra and click Create Invoice
3. From here you can use the Payments button to add Mr Haverford's payment to this invoice or the View / Print button to print him a copy or the Issue button to email him a copy.
When the other guests check out or pay, you can repeat this process to make new invoices for them.