So all these pp envelopes arrive w/no return address & the following emblazoned across top:
REQUEST FOR IMMEDIATE ACTION - TIME SENSITIVE MATERIAL
WARNING: $2,000 FINE, 5 YEARS IMPRISONMENT, OR BOTH, FOR ANY PERSON INTERFERING OR OBSTRUCTING WITH DELIVERY OF THIS LETTER. U.S. MAIL TTT.18 U.S. CODE
I'd never frequent a business that would send out this kind of advertising.