So for those with experience hiring or commissioning an outside party for your commercial project, do you guys normally set any terms or write a contract for usage/rights? Like is it sufficient to just write in an e-mail, "Hey, I'm paying for this artwork to be used in a commercial game. If you accept the job, then please don't resell it or post it online elsewhere." If there's no official contract, can the artist/musician just scoff at your request and do whatever they want with what they made? Is the fact that we're small developers make this issue completely trivial to consider, and it's normal to just commission the assets without really worrying about it?