Another thing to think about is that this is just passthrough from an AI model. If it's illegal to make a website that spits out fake IDs, then OpenAI is illegal until they filter them.
I'm not sure that argument would hold up legally. You could use an image editing site to create IDs and counterfeit currency as well, but such sites are legal.
This is only for images of money with a specific digital watermark; it doesn't detect the EURion constellation, so you can take your own and work with it just fine.