You have a letter or a parcel that has to be delivered, but you either can't get there in time or you don't have the means to do so. It's possible that one of your neighbors might do it for you! You will get a message on the app after your neighbor has successfully completed his mission, at which point the assignment will be considered accomplished. All you need to do to get started is register and choose one of your free neighbors to do this task on your behalf.