A Gloucester County postal worker is accused of creating and selling fake COVID-19 vaccination cards.

The U.S. Attorney’s Office says Lisa Hammell, of Turnersville, was charged with conspiracy to defraud the United States and fraud for her role in creating and distributing fraudulent vaccine cards.

Officials say that Hammell designed and printed the fake cards while working at a post office. She allegedly sold at least 400 cards to unvaccinated people. She allegedly charged up to $100 for a single card.

Hammell is one of 21 people charged in a nationwide crackdown on COVID health care fraud.