Presumption of supply in New Zealand

Imagine that you and your friend always share snacks when you play together. Your friend comes over to your house and you assume that they want to share your snacks again, even though they haven't said anything. This is kind of like a presumption of supply. In New Zealand, there is a law that says if a business sends goods or services to another business without first getting an order or agreement, the business receiving those goods or services is assumed to want them and has to pay for them. This is called presumption of supply. It's like your friend coming over and assuming you want to share snacks, even if you didn't say anything. So, if a business receives something they didn't order, they have to assume they wanted it and pay for it unless they can prove otherwise.