aveatry: Hi there, Supplier, I'd like to buy {Some Things} from you.
Supplier: OK, that will be £##.
aveatry: Great, here's my £##.
Supplier: Thank you.
.
.
time passes...
.
.
aveatry: Hey there, Supplier, where are my {Some Things}?
Supplier: You didn't need them, so we aren't going to supply...