A warning about a popular payment app used by big banks like Capital One, JP Morgan Chase, Wells Fargo, Bank of America and PNC Bank. Many people are seeing their money disappear and the banks are doing little or nothing to get your money back.

The digital payment service embedded in banking apps has made it easier for thieves to access funds in personal checking and savings accounts. Experts say that Zelle's simplicity and speed, the features that make it attractive to consumers, have also drawn in sophisticated scammers. Thieves use spoofed calls, phone calls that look like they’re coming from an individual’s bank, and traditional hacking to access people's Zelle accounts.

Lori Silverman in Clark Howard's Consumer Action Center says, "the best thing to do is to not use Zelle at all." She says, "there is a haven of hackers out there who will come in and move your money." She says they have gotten calls from consumers saying the banks will not refund the money. Many consumers are signed up with Zelle through their bank and don't even know it. "If your bank has you automatically signed up with Zelle you should immediately opt out," says SIlverman.

Zelle’s instant payment service started in 2017. It's now the largest player in the person-to-person payment market.