Discuss issues about inventory management processes, shipping differences, logistics, inventory performance indicators, etc.
Unfortunately, it is not possible until the ticket is fully charged.
I asked the same in spanish forum.
This is what we do at our restaurant. We receive stock of a beer keg of 20litres and we enter it as nonsaleable item and sale by weight...(more)
Loyverse allows you to make a refund, but only to the whole ticket. More info here: https://help.loyverse.com/help/credit-cards-sumup