According to TechCrunch, scammers are using Zelle to take advantage of customers; a seller of a product who is attempting to defraud customers will ask a customer to pay using Zelle instead of PayPal; many users are not aware that Zelle does not provide some of the same buyer protections that PayPal has been known for; Zelle is more similar to Venmo for transferring money to those you trust. Source