Curious about the copyright of paid assets from other accounts.

hello? I am a beginner developer who dreams of developing a single-person game. I have a question about asset copyright.

If I publish a game on Epic site or Steam using plug-in paid assets received through an acquaintance’s account, I wonder if there is a copyright problem because the plug-in was not purchased with my account.

Technically, yes, that’s a problem. You don’t own the assets.