Sample of some outgoing Mail-Art. I document them myself too, but when arrived, the receiver sometimes scans the enveloppe too. These are the final results…..
In the 80-ies I was experimenting with selfmade artistamps. Tried them on envelopes and let them run through the system. Seems the system worked quite well. In the beginning years of mail-art I even numbered outgoing mail-art. This was enveloppe number 1000. After a few years I quit with that numbering