How to set up Agency commission invoice to have their own number sequence

Agency commission invoice can have their own number sequence.
To turn the feature on go to Preferences > Reservation settings >

1. Select Invoice
2. Place a check on Generate invoice number on Agency commission confirmation
3. Press Apply 
   

To issue Agency commission confirmation open Reservations 

1. Click File
2. Choose Agency commission confirmation
3. Select language in which you want to issue it 

1. Popup for selecting the Invoice date
2. Invoice id will appear
3. Press Ok to open the preview.
   
   
   
   Such invoice will contain the invoice number (1.) and self-issued note (2.). Also, if there is an alternative currency selected it will be shown.