I want to add banknote but it has "Cancelled" stamped 3 times

https://banknote.ws/COLLECTION/countries/AUS/FIJ/FIJ0018.htm

I am curious, can I post it if it is cancelled?

A bad picture is better then none, there are also banknotes that only exists as voided as no others survived (this type seems to have some 18d).
Just put in the comment that the example was cancelled even if it's obvious.