..... I order bank notes and they arrive in a BUBBLE WRAP Mailer!! Fortunately, nothing of high value has been shipped that way.
Or $1.00 shipping on 1 note and $1.00 for each extra! Were are talking peices of PAPER here! LOL

Chips made a bulge in an envelope that often snagges on postal machinery. I have seen that too often, and often lost the chip as well.