Surely a higher denomination note would be subject to closer scrutiny; in other words, it would take longer to “process”…?
I’m a bit surprised that nobody’s mentioned an important aspect in handling high denomination notes: the higher potential loss to a business in accepting a duff one. A small retailer is going to be especially wary of this, which is why a lot of small shops in the UK won’t even accept a £50 note in the first place. And of course neither a twenty nor a fifty is ever going to be given out in change. I have no idea if it’s a matter of caution or procedure, but even in some larger stores I’ve seen a manager being called over to verbally authorise the person at the cash register accepting a fifty. Once accepted, the shop is stuck with it, and sure as eggs is eggs, the bank are going to check it when it’s paid in.
At the local theatre where I work, I’ve occasionally accepted a fifty, but I’ve had to spend quite some time inspecting the note in the customer’s presence to make sure that I was happy that it was genuine. On other occasions I’ve not accepted them simply because it would wipe out the spare change.
Fortunately with fifties the things get used so seldomly that you’re basically going to be inspecting a new note, which in my view are much easier to test than a crumpled-up thing that’s done the rounds: at least with Bank of England notes, you have the “look” and “feel” and even “smell” to think about. On a new note the ink has a slightly embossed feel, for example, which loses its prominence with handling. On tens and twenties the hologram loses its clarity with handling, too.
It’s also common practice for shops, etc. to tear fifties quite a way into the thread, to satisfy themselves that it’s actually woven into the note. I think sometimes they also get torn away from the thread, just to make sure that the note doesn’t tear like ordinary paper. Thus, even after just their first use these notes can already look somewhat manky (thus decreasing their chance of getting back into circulation).
A little while back I was proffered a Manx pound note! I accepted it on the “what the heck” principle.
Trying to get a shop in England to accept Scottish notes is about as hard, or even harder, than trying to get them to accept a fifty, though.
Incidentally, I don’t believe that a Scottish one-pound note is legal tender anywhere.