The National Bank of Cambodia (NBC) on July 13 invited the public to swap old or ripped riel notes for new ones of the same value free-of-charge at its branches nationwide, save for its headquarters, in an apparent initiative to promote the use of the local currency. The banknotes will be exchanged as long as they are not damaged beyond recognition and can be confirmed to be genuine, the central bank said…
July 14th, Phnom Penh Post
https://www.phnompenhpost.com/business/nbc-makes-fresh-push-riel-use