None out of over 40 sent with a QR. as long as you confirm their address
is valid there's no reason for it to get lost. They make the physical
label for you.
Might be an old post? But the QR code's have been super easy and
efficient for myself. I mail 2-5 things daily by QR code. The frontline
workers at USPS and UPS love em as they're easy.
