May 7 is the big day.

Jeffrey Greenberg/Getty Images

Chances areyouve heard about the Real ID maybe you already have one.

If you don’t have one, youll be denied entry at TSA checkpoints.

REAL ID at Miami International Airport

An example of a REAL ID at Miami International Airport.Credit:Jeffrey Greenberg/Getty Images

But what exactlyisa Real ID and how do you know if you have one?

And if you already have a passport, do you even need one?

The short answer is no.

These Enhanced Driver’s Licenses and identification cards are an acceptable alternative to a Real ID.