Is this a replacement note? [solved]

I have 2, 1 ringgit notes, with a ‘Z’ as the second letter in the prefix, are theses replacemen notes?  

Like this - yes. The other way round, then is a no.

okay thank you, mine are the other way around 

If the Z has to be in the first position then this sentence has to be changed.
To find if note is a replacement banknote, check if there is the letter "Z" in the serial number.

The serial number is HZ4218754, is that a replacement?

The answer is no.😀

But there are

okay thank you