Travelers who are headed to airports and hoping to use their Costco membership cards in place of Real IDs are out of luck. Travelers need a Real ID — or other acceptable form of identification — for domestic flights and for accessing federal facilities as of May 7.

The Transportation Security Administration is warning air travelers of something that should be obvious – a Costco membership card is not a REAL ID substitute. The TSA is again reiterating that the Costco card is not an acceptable alternative for REAL ID or other forms of federally acceptable identification.