Honest questions: How do you explain to your potential buyers (or govt agencies) when they ask you where you get the data from? "Various sources"? I mean, sure

Honest questions: How do you explain to your potential buyers (or govt agencies) when they ask you where you get the data from? "Various sources"? I mean, sure, you can collect data however you want, but I don't think any legitimate business want it unless you collected it legitimately. Or am I wrong?