In my latest blog post, I dug into the legality of using ® or ™ on names that aren't officially trademarked. To cut it short, it's indeed illegal to use ® on a name that you haven't formally registered as a trademark with the relevant authorities. The ™ symbol, on the other hand, can be used even if the name isn't officially registered. It's a way to indicate that you consider the name to be your trademark. It's crucial to be aware of these rules to avoid any legal ramifications.