I thought about this today.
There are many notes with serial numbers that have a space, mostly it is between the prefix and the rest of the number but sometimes it is in the numbered sequence.
When you record serial numbers on Numista and elsewhere such as a home spreadsheet, do you list it with the space or ignore the space?
Some examples from my collection:
Bolivia 100 Bolivianos
Russia 1000 Roubles
What about other separators such as periods?
Argentina 100 Australes







