Let customers pay without a PayPal account
With PayPal Express, the default is set to ask customers to log in to PayPal (or create a PayPal Account). From your PayPal Business account, you can allow customers to pay with their credit card even if they don't have their own PayPal account. To enable this feature, you need to have linked your own credit card to your PayPal account.
You can learn more from PayPal Help.
Log in to your PayPal account on PayPal.com.
Under Selling Preferences, click Website Payment Preferences.
Select "PayPal Account Optional".