The "buy a blank PDF" part of that site made me chuckle. I wonder what accounting reasons there would be to do that rather than just ask for a tip, or if he did it simply for the humor.
Happy to report I've had one person buy the PDF.
It also looks like you need to specify information about your "organisation", including specifying a treasurer? How could a single person even fill this out if they wanted to?
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It appears permits aren't given to individuals and there is simply no legal way for a given person to ask for donations in Finland.