They're PRINTING their own unmarked money.
Money Heist Season 1, Episode 4
and Nairobi had the PRINTING presses
working at full capacity.
Money Heist Season 1, Episode 11
PRINTING money...
Money Heist Season 1, Episode 10
What? You guys got, like,
a PRINTING press in the garage
churning out 50s?
Breaking Bad Season 2, Episode 12
-Those at the PRINTING press, there.
-Don’t talk about the plan to anyone.
Money Heist Season 1, Episode 11