I saw this auction on Ebay and the seller said it is a "Ladder" Note. Here is the link: https://www.ebay.com/itm/2013-US-20...459935?hash=item1ee9ad2edf:g:5ZUAAOSw01Jbjy4o I know it has 3,4,5,and 6 but they are not in order. My question is: Do the numbers have to be in order to be considered a Ladder Note? Or can they be in any order as on this auction? I guess that is 2 questions. Thank you in advance for anyone who replies.

A true ladder is 8 numbers in sequential order. 01234567, 12345678, 23456789, or 34567890 or the reverse. These "eBay ladders" just go to show that sellers can say whatever they want to try and part novice collectors from their $$, or that they don't know a specific part of their anatomy from a hole in the ground when talking about coins and currency (deciding which one is left as an exercise for the buyer)

At best that would be called a "broken" ladder. Take the right numbers and move them around and a scam artist would call it a "scrambled" ladder. A ladder note can be the same number or a higher number. 00146668. A true ladder is as Oldhoopster described and they are only printed 1 in every 96 million notes. That's why they command a premium. Then, there's the reverse ladder. Same thing but the high number is on the left and it goes down with the lowest number on the right.