Number written on priority mail?

Im sure its probably nothing but why would usps write on the pack? it just has the number 4 circled on it


Comments


[3 Points] slowwburnn:

You're fourked, mate


[2 Points] SDFSFSDFASDFSAD:

All my packages, priority and express, clearnet, amazon and darknet, have that. Its nothing.


[1 Points] None:

[deleted]


[1 Points] drimilr:

Its for sorting. My office does it on all my packages whether I send them to my PO box or to my street address