A lawyer is suing New York City’s Metropolitan Museum of Art, claiming the institution is purposely misleading people about how much they have to pay to get in.

Like other museums in the city, the Met has what it calls a recommended admissions charge. It’s $25 for adults.

But people don’t actually have to pay that much to get in. They can legally enter the museum for a donation as low as one penny.

The lawsuit says the museum fails to make this clear to visitors. It says the signs and the cashiers make people think they must pay the full $25.

Met spokesman Harold Holzer denies any deception was in place. He called the lawsuit a “nuisance.”