Help about a colombian note [opgelost]

So i've had this note for a while now and i've been curious about the stamp on it. It says V.F.R. on it. I've asked a couple of people about this and the best guess is that it's a circulation thing where someone could've put his personal stamp on it. I still wanna hear other opinions what it might actually mean. Thanks.

Some money exchangers, casinos etc mark their bills.

Idolenz

Some money exchangers, casinos etc mark their bills.

Makes most sense to me, thanks for the answer.

Idolenz

Some money exchangers, casinos etc mark their bills.

-They're called “chop marks” & they're often seen on higher denominations.

Here's another explanation.

Had one one a 500€ bill some years ago, thought it maybe shady money. According to imreh it says: 

The Arabic text reads: علئ فرهاذ  "ala FiRHAdz"