Pos Split Invoice

This module adds a "Split Invoice" pricing rule to pricelists. On a pricelist you can set a splitting partner, and on each price rule choose the Split Invoice computation, a split percentage and the base used to calculate it (sales price, cost or another pricelist). In the Point of Sale, products covered by such a rule show a reduced price, and each order line stores the amount that will be invoiced to the second partner.

When the order is validated, Odoo requires a customer on the order if any line is split; otherwise it blocks payment with a warning. It then creates a separate customer invoice (or credit note for negative amounts) for the splitting partner, using the order's invoice journal, payment terms, fiscal position and bank account, and links it back to the order. The order form shows the generated invoice and the split amount per line, and the invoice form shows the originating order and the original customer.

This is designed for co-payment situations such as medical centres or pharmacies, where one party pays part at the counter and another party is billed afterwards. Split pricelists are meant for Point of Sale orders only, not for regular sales orders.