The picture above (though from Mexico) is likely what one will notice quite frequently when living in Brazil. Many businesses offer free delivery of their products, be it bags of cement from a supply store or local produce from the corner. There’s no awkward silence or wait where the delivery person anticipates a tip. It’s simple, quick and free.
If ordering food from a restaurant, there are sometimes taxes for delivery added to the total bill which is then usually given to the driver…um, I mean, motorcyclist (as is the case when restaurant food is ordered). If no delivery tax, then a small tip, while not expected, is probably appreciated.
Any kind of delivery is either paid up front with the total bill or tipped upon collection. Free deliveries usually only take place upon promotional sales.