If you want to add a comment or a note to the receipt when ordering, e.g. a customer number or a special request when ordering, you can do this immediately - right when you place the order or in the shopping cart.

While you are booking

1. Long tap on an item in the item-overview. 
   
2. Then tap on "Add a comment on the item..." and enter the comment or your note. 
   
3. Your comment or note will be printed on the invoice below the item:
   

This also works for free-price items! With a long tap after entering the price you can determine the number and add a note.

In the shopping cart

1. Book one or more items by tapping.
   
    
2. Tap on the shopping cart in the top right corner.
3. Tap the item you want to add the note to.
4. Then tap on "Add a comment on the item..." and enter the comment or your note.
   
5. Your comment or note will be printed on the invoice below the item: