Would they pursue something like counterfeit software licenses or gift cards mailed via USPS, if the scale isn't as large (like <$100)? Asking since it's happened to me on smaller scales before, but the amount is smaller and I'm not sure how to prove I received whatever I received...
I once had the USPIS hunting for a $10 monthly subscription box of snacks when it was signed for at an apartment building but my friend never received it. Got a call from a gruff-sounding agent promising to look into it and everything.
I don't think I ever got a follow up after that, though...
