It actually happened to me on Sunday 21 July at a vattanac bank atm inside a smile grocery store.
Also had copy written on it.

Cant believe it happened but it did.
They guy was telling the truth.

I pulled out 100usd from Vattanc bank atm in Phnom Penh, I can confirm it's a fake note. I didn't notice until 2 days later when I tried to spend it. :( Is there any recourse? I told the tuk Tuk driver from the hotel and he told me the manager there is known to be a bit crazy. Who knows. But its a f...