Caught me by surprise but it shouldn't have. I'm scanning small size US currency so I can list the notes on eBay. Date range is from 1928 to the 2000/2010 decade. $1, $2 and $5 notes were no problem. But the $10 notes caused my computer software to say I can't scan them. The reason hadn't occurred until that point. Anti-counterfeiting! I assume I can get around that by using my digital camera. And I see enough $10 or greater modern US currency listed on eBay so that I suspect that will work. Maybe. This will be a learning process. I haven't used my camera for quite a while. Might as well get used to using my camera. I have a bunch of slabbed coins that I also want to list an eBay. And since my scanner requires items to rest right on its glass surface, a slab keeps coins from doing that, hence fuzzy images. This old dog will have to relearn camera procedures.
Strangely I've never had my scanner refuse to scan any currency as of yet. Either my scanner can't recognize the feature, or just none of the notes I've tried to scan have it. But yeah, alternative if it refuses to scan would just be to take a picture of it with a digital camera.
It's not my scanner that refused. It's something that is part of my computer software. I can scan and see the image but my computer refuses to allow me to open the scan image. Therefore I can't edit or save the image.
I've heard of that but have yet to actually see it happen. I know some modern currency has a code that software interprets as blocking certain actions, as an anti-counterfeiting measure. Probably only recently made, higher value notes have that feature. Nothing in my collection has triggered it, as of yet.
I have heard other collectors experience that problem: the perils of uploading updates in software (I suspect). Every time I updated my software I experienced long delays (problems running my computer) so I stopped. Anyway- I also never experienced any issues scanning notes but have since abandoned my scanner after my last HD crash. Now I photograph or screen-capture the sellers' images (tho often a different SN).
It’s the EURion Constellation: https://en.m.wikipedia.org/wiki/EURion_constellation It prevents digital reproduction of notes that have that “feature”
