Are there plain clothes police patrols in Warsaw, or was I a victim of a scam?

Question

I was walking along the river in Warsaw in the afternoon and was approached by two men who claimed to be police. They showed me ID, but I have no idea what Polish policja ID is supposed to look like, much less how to tell if it was fake. They said they were checking for illegal substances.

I was suspicious because they weren't wearing uniforms and was kind of expecting them to rob me. In hindsight, I guess I should have asked if we could do this somewhere official, but nerves. Anyway, they asked for my ID, and one guy searched my pockets while the other guy was apparently copying down info from my ID. Nothing obviously bad happened, though whoever it was has my name/address/birthday/etc.

So, are plainclothes illegal substance 'stop-and-frisk' patrols a thing in Warsaw? Or were these guys more likely data-mining or otherwise planning to rob me?

Answer 1

There are reports of much of what you describe as being a scam. FromWorld Nomads:

But not even A grade uniform recognition skills will help you with one con; thieves claiming to be plain-clothed policemen come to assist you. The "policemen" then ask to see your ID and credit cards and to be given PIN numbers. The fake police officer will then look through your wallet, giving it back to you saying everything is fine. He will be long gone by the time you realize some of your money is missing or credit cards are gone. No genuine law enforcement officer will ask you for your PIN.

Answer 2

While this may have been a scam and I'd follow Mark Mayo's answer to similar question about Spain, seems that in some cases Polish police are allowed to be on service while not wearing a uniform.

To quote Police Act (source in Polish):

Policjant w czasie służby jest obowiązany do noszenia przepisowego munduru i wyposażenia. Komendant Główny Policji określa przypadki, w których policjant w czasie wykonywania obowiązków służbowych nie ma obowiązku noszenia munduru. (...) Przy wykonywaniu innych czynności administracyjno-porządkowych nie umundurowany policjant obowiązany jest na żądanie obywatela okazać legitymację służbową lub znak identyfikacyjny (...).

Which translates to

Police officer on service is obliged to wear uniform and equipment. Chief Commander of the Police defines cases when policeman performing his duties is not obliged to wear a uniform (...) While performing other administrative and law enforcement duties, policeman is obliged to show his badge or other kind of identification (...)

I've seen patrols like this and seems that looking for drugs may be one of the duties defined by the Chief Commander where they aren't obliged to wear uniforms, although I don't have any official source for that.

Answer 3

Tell them that you don't have ID or money and that you're homeless in the country illegally. If they are thieves, they will leave you alone. If they arrest you, show them your ID and say that when you said you don't have ID, you meant that you don't have a Warsaw ID.