How is the delivery of an object or the provision of a service supplied?

Each exchange takes place on the basis of a free agreement between the users.
In general, if the two users live in the same city or province, they can meet and make the exchange. If they prefer, they can search for an user who offers this kind of service. At least has a Partnership sith SPEDIRE.COM that offers delivering service from and to Italy. In future will have this kind of service all over the world.