".55 cents if you send it delivery confirmation, (I do with all chips, Have had many people claim not received before using this.)"

Once I was standing at the mailboxes when the mailperson arrived.
I watched her put a padded envelope, with a delivery confirmation tag, into my neighbor's mail box.
I said: "Excuse me, I think that's mine."
Only after some argument did she agree to take it out and look at it.
It was mine.
So much for "delivery confirmation".