According to the latest advice on the TSA’s Real ID landing page, “Passengers who do not yet have their Real ID or another TSA acceptable form of ID can expect to face delays, additional screening, and the possibility of not being allowed into the security checkpoint. This includes TSA PreCheck passengers.”

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 T.S.A. is reminding travelers that Costco cards are not on their own going to get you through security. “Can’t fly on hot dogs and hope,” the agency said.