Can I still apply for a refund if I used Pay in 4?

Yes, you can still apply for a refund for your purchase when you use Pay in 4. If you return some or all your items according to your legal statutory rights and/or the refund policy of the merchant, you will get a partial or full refund. Partial refunds will lower the amount that you owe in the payments you have left. Any refund issued will be paid to your PayPal Balance.