The text may have urgent language or appear from a legitimate source. That's by design, and it could be to your detriment.

The latest FBI warning includes toll scams, but adds bogus messages from package delivery companies, Forbes reports. The tactic is known as “smishing” — a combination of “SMS (Short Message Service ice) and “phishing” — and it uses text messages to trick people into giving out sensitive personal information.

The FBI is warning about a smishing scam claiming you owe money on unpaid toll road feed. Here's what they say to do if you get the text messages.