Ladder Serial Number Star $20 Note. 12357406☆

Seeing that only three numbers are consecutive, which is not that uncommon, I doubt any additional value is observed other than the fact that it's a replacement note. Series 2017A $20 Atlanta District replacement notes are plentiful. Personally, I keep all $1 and $2 replacement notes I find in circulation but get a bit more choosy when it comes to any denomination that's $20 and above. Cool find but I'm doubtful any profit realized would be worth your while.

Unfortunately this is a 'broken ladder' and these notes don't carry a premium but who knows what sells with a minor increase over face value to very casual collectors these days who find something 'interesting' or more likely confuse its value with a true ladder (info below). Just keep in mind they would tend to not have resell value such as to real collectors or dealers in those cases but your allowed to collect anything you want! Generally replacement star notes are worth keeping or at least worth looking into its specific rarity, in this case however its from a very recent series and not a low print run so at the moment it should also have no added value as well with the same repeat of what I said about the broken ladder. Personally I usually would not keep these low potential notes for future increase in value reasons unless it had a much lower face value like $1 similar to what steve mentioned. I might however keep a few just for a personal collection as its indeed a 'cool' find for a collection and is in uncirculated condition. https://www.mycurrencycollection.co...ar-note-rare

Some additional info below on ladders.

Ladder - In a ladder serial number, every digit is one number higher (or lower) than the previous digit. Really the only true ladder is a serial number than contains a letter then 12345678 followed by another letter. The true ladder in its purest form is only printed once for every 96 million notes in a standard print run. True ladders are rare and command a premium.

There are also many other examples of ladders. Some people would consider A00012345A to be a ladder. Others might call D00034567A a ladder which have duplicate numbers.The next closest thing to a true ladder in terms of value is the true reverse, backwards, or step down ladder. It looks like A87654321A in its best form. Reverse ladders are fun, but they are always less desirable than up ladders.

A cheap form of a ladder comes in the "broken" ladder. It reads something like A01200304A. Some people like these, but they are really just more affordable versions of what people really want. Some do collect them and may sell on places like ebay to those casual collectors for small premium. Some scam artists have recently tried to push the "scrambled ladder." The scrambled ladder consists of 8 unique numbers, like A92378514A.but have no added value normally to true collectors and dealers.