JPMorgan Chase is suing customers who took advantage of a viral “glitch.”

Court documents show JPMorgan Chase is taking legal action against customers who exploited a viral technical bug that the bank says led to check fraud.

The errorDiscovered and promoted by TikTok users in late August, it allowed customers to deposit oversized checks at ATMs and immediately withdraw funds before the checks were cashed.

The error gave customers access to thousands of dollars they didn't have — and on Monday, Chase filed four nearly identical lawsuits against customers who had a total of more than $660,000 withheld from the system.

In Texas, the bank is suing Timipah Ikemi after a masked man allegedly deposited a fraudulent $335,000 check into his account at an ATM in late August. Ikemi immediately began withdrawing the ill-gotten funds and has done so, according to the bank He withheld $290,939.49 from that deposit.

In California, the alleged defendant was Micah Reed owes the bank $90,794.02 after depositing two fraudulent checks into his account at an ATM and withdrawing much of the deposited money before the check cleared.

And in Florida, two companies called Riskboss Musiq and In and Out Appliances are said to have debts to the bank $141,295.84 And $138,680.91or after failing to refund amounts withdrawn as a result of fraudulent check deposits.

The defendants could not be reached Bloomberg Law or Reuters.

A Chase spokesman said last month that the bank had been made aware of the “error” and that “[r]Regardless of what you see online, depositing a fraudulent check and withdrawing the money from your account is fraud, pure and simple.”

Mark Guthner, an associate professor of financial practice at Rutgers University, told Banking Dive at the time: “If they take the money out of the bank, the banking law is pretty clear that they have committed fraud and have to return the money.” Then it's on the bank to prosecute the people and bring them to justice.”

“[It’s] an offense punishable by imprisonment and a fine. The people who did this are in trouble,” Guthner said.

In court documents, Chase's lawyers wrote that the bank “takes pride in its efforts to protect its customers from fraudsters, especially in an environment where bank and wire fraud are increasingly common.”

“While the fraud methods have evolved over time, the core intent of exploitation and deception remains unchanged,” the lawsuits say.