Money transfer apps can be magnets for scams and fraud, but there are ways to use them safely.

To accept credit cards with PayPal, set up a business account, connect to PayPal’s payment gateway, and use PayPal Zettle for in-person or online payments.

PayPal can be used like a bank in some ways, with tools for spending, saving and accessing cash — but it’s a fintech company, not a regulated bank. Some PayPal funds are FDIC-insured up to $250,000 ...