This service doesn't include any additional costs and is available for authorized clients only.
If you and your order meet the requirements, you should be able to see the option Pay-in-3 by accessing your PayPal account. You'll then be a few steps away from completing your order.
When requesting a Pay-in-3 payment, PayPal might need to run a credit check with an external credit reference agency and it might provide them with information about how you handle your refunds.
If your request is approved, you'll enter into a contract with PayPal. This means PayPal becomes the creditor.