President Donald Trump attacked mail-in voting on Monday with an anecdote about one of his own trips to the ballot box that included a very unlikely detail.

“They asked me for my license plate,” he insisted. “I said, ‘I don’t know if I have it.’ They said, ‘Sir, you have to have it.’ I was very impressed, actually.”

Trump didn’t mention where this happened, but he has cast his most recent ballots in his adopted home state of Florida, which requires voters to present a photo ID as well as proof of signature if it’s not on the photo ID.

A license plate doesn’t contain a photo or a signature.

A Florida driver’s license has both, and may be what the president was referring to.