A Michigan nurse has been charged with the theft of legitimate COVID-19 vaccination cards from a Veterans Affairs hospital, which she later resold, The Washington Post reports.

Bethann Kierczak also stole vaccine lot numbers that were needed to make the cards seem authentic, selling each card for $150 to $200, per the report. The 37-year-old ran the scheme for more than four months in metro Detroit, selling the cards over Facebook Messenger.

“Regardless of whether an individual chooses to get vaccinated, we urge everyone to avoid turning to schemes like these to evade vaccination requirements,” acting U.S. Attorney Saima S. Mohsin said in a statement. “Selling these cards is a crime.”

The complaint includes messages between Kierczak and an unknown buyer, which court records label as “Confidential Source.” Introductory communication between the two began on May 22, and on June 3, the buyer asked for a vaccine card for a father who was only permitted to see his children if he could prove he was inoculated.