What's current state of adult paperwork for content producers?

[beavr]

What's required by US/EU law and what's the practical way to keep track of paperworks for content producers?

In what cases content produces might be required to provide paperwork?

[jsmih]

Google 2257 for the US. Lots of VERY specific detailed rules, with paperwork being open to inspection at the posted location. Here's a good Q&A, tho it hasn't been updated to account for Jeff Sessions.

Ten Frequently Asked Questions About The 2257 Regulations