0-euro notes : 0 d. Introduction

Some extra remarks on the serial numbers:

Austria has Euro notes starting with N. The 0-euro notes therefore also start with NE.
In 2017 a 0-euro note was emitted with XELH.... X is the letter for Germany

From 2018 on, new notes get a serial number with a logic sequence, for example Finand: L(E)...
Notes start with LE AA, LE AB, LE AC, ...
I's and O's are not used to avoid confusion with 1's and 0's, so it goes from LE AH to LE AJ and from LE AN to LE AP.
This is often the case, for example Mexican  notes don't have I's and O's in serial numbers either.

Before 2018, Seral numbers start with rather random codes (Finland 2017 : LE PZ...)

Most notes were printed on 5,000 or 10,000 copies.
In few exceptions, there are less, sometimes there are 20,000 30,000 or even 35,000 copies.
If a design is reprinted, the date will show 2019 - 2 (second printing).
Some French notes were reprinted 6 times so far.

In some cases the numbering adds up, despites the fact that the design is not the same.
One example is a set of notes issued by the Zoo of Duisburg (Germany).
The title of each note is : ZOO DUISBURG, therfore the numbering adds up (since the depicted theme remains the same), on the note however, we see different animals on the different notes in the set.

Zoo Duisbrug 2017 - 3

Zoo Duisbrug 2017 - 4

Zoo Duisburg 2017 - 5

Another remark goes for some special sets, like the set that was issued for the Wold Soccer championship in 2018.
Several counties which participated at the Soccer Worl Cup, issued a 0-euro note.
In the titel we see the country name (so each note has a different 'title)' and a different image of a player and a typical artefact from the home country.
The code next to the flag adds up :

2018 - 7 - DK

2018 - 8 - JP

2018 - 31 - TN

This is a special edition of the 0-euro note.

To be complete, some notes were also issued on polymere paper.
These are issued in different amounts (2017 copies) and all have a serial number starting with UE ...CO... regardless the country.

Polymere note : marked 'collector 2017'

serial numbers UE ... CO ......

And finally, some blank or perforated notes exist too.
These notes are issued with 'specimen' as perforation, and don't bare an image at the front side.

To be continued...