Since the spring release you can pay open invoices in the POS, which is great!

But you can only pay one invoice at a time, so a customer with 3 open invoices needs to pay 3 times and if they want to buy extra products at the same time it's again another transaction.

It's generally much nicer to a customer to let them pay all invoices at once + buy the extra products.

We sell a lot on invoice and very little is done by prepayment (or only partial prepayment). That way with delivery at home your customer gets an invoice of the remaining amount and it's nice that they can pay this in store, but this new way is not very customer friendly when we are talking about multiple invoices!