M.n.o.o.p. (Mint Not On Original Paper)

"Not used but rather the self-adhesive cousin of hinged."

"I disagree. Since it is now fully adhered to paper, it no longer has gum. It HAS been used, just not canceled. A hinged stamp (in most cases) still has its original gum intact."

If I am am understanding what the OP is doing, I would say that it still has its original gum "intact." The paper that it is being applied to is "from another stamp" so it could still be removed from that paper, glue intact, and used as if just removed from the booklet.

Discussions about what to call this are almost pointless because of misappropriation to start with of the word "mint." We lost the battle on any meaningful use of the word "mint" with "mint (never hinged)" as if a never used but hinged stamp was still in "mint" condition. When appropriated for items other than coins, the only sensible meaning of "mint" is "perfect." Since we seem intent on using "mint ..." to mean something other than "perfect," the best that we can hope for is that the description accurately conveys the condition of the stamp. If we are going to continue to use "MNH" we cannot objectively reject "MNOOP." But unless that practice is common, I doubt that the use of that acronym has any chance of becoming common. Instead, it just illustrates the Alice in Wonderland character of this discussion.

Basil

Ahh, my mistake. Other backing paper, not just any piece of paper, which is how I read it.

That begs the question though, since we're splitting hairs: Since most backing paper has content printed on the back, the stamp would now be affixed to backing paper that is not original to that stamp. Would anyone care? Frankly, no self-adhesive stamps are likely to be worth more than face value in our lifetimes anyway, so the point may be moot.

I also use the stamps around the one I am keeping, I pay all my bills by snail mail and I ask for commemoratives when getting stamps!

My solution: collect used stamps.

Yeah. That.

I see stamp dealers do something similar to this all the time. They will peel a single especially from a booklet and place in on a different backing paper to sell it as a single. Especially true for double sided booklets.

Which is why I buy only full booklets directly from USPS. I can use some of the stamps for postage & then easily keep the leftover(s) for collecting.

It is still on backing-paper so the gum is intact!
But what if the backing-paper had been printed upon.... and the new backing-paper had another print?

Oh wow! If the dealers are moving stamps off original backing paper and putting it on backing paper of other used self adhesive stamps, without disclosure, I don't think I will bother with them. (The stamps that is) To me that would be T.R.A.S.H.postage. Total rebellion against self adhesives.

"I disagree. Since it is now fully adhered to paper, it no longer has gum. It HAS been used, just not canceled."

Now I know you read further and saw that stamp in question still has its adhesive, but lets say it was adhered to a regular piece of paper. That still does not make it used as it has not gone into the mails. It is the self-adhesive equivalent of an unused no gum stamp.

Unused no gum and used uncanceled are effectively the same thing. Beyond the knowledge of the original owner, and other possible marks, scuffs, etc., there is no way to tell by looking at a stamp affixed to a piece of paper whether it has "gone into the mails". It's a meaningless distinction.