Someone sent a message saying that a relative and friend of mine owed money to their loan company and asked me to tell that person, but I don't know those people at all. Are they liars?

As long as it is related news from people you don't know, ignore it.

Even if the text message sent by someone you know involves money, you need to confirm it by phone before you do the next step.

Nowadays, scammers are deceiving people with all kinds of excuses and excuses. The scripts are all designed, so just ignore the text messages when they come.