Hmmm not the answer i was hoping for. Can it be done via 'reservations'? 

Chatgpt came up with this answer:

"is this correct?"

Here are the steps to set up partial payments in Odoo POS for restaurant reservations:

1. Go to Point of Sale (POS) Configuration:
   • Navigate to the POS app.
   • Go to Configuration > Settings.
   • Ensure the "Allow Partial Payments" option is enabled.
2. Create a Reservation (Sales Order):
   • When creating a reservation, create a sales order in the Sales module with all the details of the reservation.
   • Record the total amount due for the reservation.
3. Take a Downpayment in POS:
   • In the POS interface, process the downpayment as a partial payment.
   • Ensure the payment is linked to the corresponding sales order created for the reservation.
4. Manage the Sales Order:
   • After receiving the downpayment, update the sales order to reflect the amount paid.
   • Generate an invoice for the downpayment if necessary.
5. Finalize the Payment:
   • When the customer completes their payment, update the sales order and invoice to reflect the final payment.
   • Ensure that the reservation details are updated and the balance is cleared.

By following these steps, you can efficiently handle downpayments for reservations in Odoo POS for restaurants. This ensures proper tracking of payments and helps manage customer reservations effectively.

If you use the appointments app for making reservations, it is possible have an up-front payment (on the options tab of an appointment)