Why was my Klarna invoice payment declined? Klarna may decline an invoice payment for several reasons. In most cases, it’s due to a credit assessment or a temporary technical issue during checkout. If your payment doesn’t go through, we recommend contacting Klarna’s customer service for help. You can reach them by phone at 0808 189 3333, or visit Klarna’s customer service page for support. If you’ve tried multiple times without success, it’s a good idea to wait 24 hours before trying again. Klarna can also provide more details about the reason your invoice was declined and help you find a solution. Related articles General Terms and Conditions How do I make a return? What payment options can I choose? How do I return swimwear? What payment options do I have when I choose Klarna?