The TSA attempted to dispel rumors on social media that using a Costco card is equivalent to using a REAL ID to get through airport security.

Starting May 7, if you don't have a REAL ID — or another acceptable form of identification — you will not be able to board an airplane.

How do I check if I already have a Real ID driver's license "REAL ID-compliant cards will have of one of the following markings on the upper top portion of the card," the DHS website said.