It had been stamped "Return to Sender." They had REFUSED to sign for it. For all they know, I had enclosed payment in full! Just how stupid ARE these people? I'm thinking that now, I'll send a C&D letter, in a full size mailer that's at least 3/4" thick with a "Delivery Confirmation" on it. (I'm told by Post Office that it has to be that thick to qualify for Delivery Confirmation) It seems to me, that if it comes to court, they gave me the BEST piece of evidence by refusing to accept that certified letter. Thoughts?