Postal stamps BOND the DELIVERY of the document within the Law of the Post Office for PUBLIC commerce (PUBLIC issue), thus within the Seat of Government, not within the Law of the Federal Reserve PRIVATE commerce, thus within a private BAR matter.
That is all those stamps really do: secure the jurisdiction in which the documents shall operate.
So, in essence, YES to your question. Adding VALUE to the paper so it can be ENFORCED within a COMPETENT jurisdiction, thus the paper is not useless, but WORTHY.
VALUE: the regard that something is held to deserve; the importance, worth, or usefulness of something.
WORTHY: having or showing the qualities or abilities that merit recognition in a specified way; deserving effort, attention, or respect; good enough; suitable.
If the matter is not a public issue, then that matter stands as a private bar matter for the inclusion of one is the exclusion of another.
We are called to be architects of the future, not its victims;
Resistance is futile.
If you think you can, you are correct.
If you think you can't, you are correct.