A quick question: doesn't the postal system make you cover up all barcodes that don't have to do with the actual shipping (like tracking) to be acceptable?
I read on the USPS site that you must cover up old barcodes when you use your own boxes (I guess so you don't confuse the machines) so I assume this is also the case with envelopes.
Has anyone had a problem sending barcode art on the outside of the envelope?
Yes, the postal system likes to makes these rules. Mail-Artists like to play with these rules. The basic concept of mail-art. So when you confuse the postal system, it might be part of the play.....
If you want to play safe (and be sure your mail arrives), that is ok too.
Yeah, I want to make sure the person receives it.
I guess I'll stick any barcode-art on the inside.