Greetings Poland!

I arrived today in Poland and found a couple of these notes on the sidewalk, looked around there was no one nearby. One of them has a "13" written on it. Since I only use revolut I’ve never seen one. Any way to tell if they’re real or any suggestions?
Thank you!

https://i.redd.it/bfpknlqpowhd1.png

Posted by linuxPT

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