10 000 Ringgit

The 10,000 Ringgit is among the highest face-value polymer banknotes ever issued anywhere in the world. Brunei introduced polymer for its upper denominations partly due to the note's infrequent but high-stakes circulation — large-denomination notes in Gulf and Southeast Asian trade settle interbank and government transactions where physical wear matters less, but counterfeiting risk does not.

Note Printing Australia has supplied Brunei's polymer series since 1996, when the country became an early adopter of the Guardian substrate outside Australia itself. The transparent window on this denomination is integrated into the note's structure rather than applied as a patch — a distinction that meaningfully raises the barrier to replication.