The other day I got two requests, and apparently clicked one of the "Print Wrapper" buttons twice, instead of each one once. 

I discovered my error before mailing, but after affixing the stamps.  I thought could take the erroneous package to the post office for credit, but the local post office guy said no go.

To save the $2.13, should I cut them out and paste them onto a future package, or steam them off?

Thanks,

Doing a little research, it looks like it is indeed illegal to use those stamps on another package.  However, I'll just use that packaging next time, and tape the correct address over the incorrect one.

Al,

that's fine.  Edited my reply because I misread your post.  I thought you were using printable postage - never mind!  You should never cut stamps off a package and reapply them, because an eagle-eyed postal worker can return the package to the sender.  Even if they were never used before!

Some of the info above is wrong.  It is indeed illlegal to reuse stamps that went through the mail but failed to get cancelled and if you cut them off and paste them on another package, that is what the PO will think you are doing.  However,  (!!!!)  stamps that were stuck on but never used, can indeed be used.  Cut around them, suspend them in warm water for an hour or so and they will slide off the paper.  Lay them out to dry on newspaper or some such and reattach them with a glue-stick to the next package.  Of course, they will look just like ones that went through the mail and missed getting cancelled and were re-glued, but will also look just like brand-new fresh ones.  I have done this and it works well.  This is, after all, the only way that stamp ccolletors could collect used stamps for their collections without having a lot of envelope corners in their albums.  Today's peel and stick stamps don't soak off as easily as the old "lick and stick" ones, but they will come off OK with warm water and a little more time.

Well, stamps that go through the mail and aren't cancelled look just like they did before they were used at all, and are indistinguishable from new ones except for the lack of glue.  They all look new, and anybody that wanted to use them again would probably get away with it, though it is indeed illegal.  So they aren't both old and new, they are all new other than their experience of passing unscathed through the mail and they can't talk to you about that.