A few years ago, some Eastern Europeans used to pop a printed plastic bag through our doors, inviting people to put unwanted items in them and leave them outside. The bags were printed with logos of various charities. But our Local Council investigated, and discovered that these people were merely scavenging for their own use, not for the charities.
Then, I ordered a new washing machine, and paid £10 for the delivery/installers to take away the old one and dispose of it. We left the old one out at the front of the house, but in two shakes of a donkey's tail, the Eastern Europeans appeared and took it away! Hee hee, this saved me £10, which was refunded by the firm.