I remember sending American hunting magazines to a young fella in Australia as CHRISTmas gifts. I went to Staples & got one of those big bubble wrap envelopes to protect them. I slipped the magazines in & was just about to seal it shut when my cell phone rang. I put it down & answered the phone like a good hubby ALWAYS does
& forgot to seal it. Turns out that was a good thing. The lady at the PO wanted me to empty the envelope to show the contents. I would have had to buy a 2nd envelope from them.
Just a thought I remembered.
HTH
