In reference to the habits of post offices everywhere (though in his case, in Britain), zanda_myrande had this to say:
I was dreading coming home tonight to find one of those cards on the doorstep. You know the ones..."This package has been returned to our depot in Glasgow, where it will be kept for one hour before being ritually burned. You may collect it from there on presentation of three passports and your first-born child."
His package arrived safely with no little card, and there was much rejoicing.