Private Issue Crypto Envelope
Besides cards and coins, Bitcoin was also loaded on artwork, but never on the face of an envelope and passed thru the postage system until July 26th 2017.
I wanted to be the first to send a loaded paper wallet on the outside of an envelope thru the postal mail system.
It shows the public address QR and the
Private QR that is BIP32 encrypted with 0.02 BTC.
YES, you can scan the PRIVATE KEY and if you can crack the code you can have the 0.02BTC that is in it, but not the envelope. Goodluck!