Why isn’t the payment working at checkout (payment error, 3D Secure, Klarna, PayPal, card declined)? What can you do?

Try the following steps:

Step 1: Clear browser cache
Old session data can cause issues. Clear cookies and cache or use a private/incognito window.

Step 2: Try another payment method
We accept:

• Credit card (Visa, Mastercard, Amex)
• PayPal
• Klarna
• Apple Pay / Google Pay
• Shopify Payments
  
  

Step 3: Fix specific errors

• “Card declined”: Check limit, expiry date, CVV, billing address. Confirm bank request if needed.
• “Klarna declined”: Try again later or use another method.
• “PayPal error”: Restart PayPal session and log in again.
• “3D Secure loop”: Contact your bank.
  
  

Step 4: If nothing works
Email support@doonails.com with:

• Screenshot (no sensitive data)
• Payment method
• Country / shop

We’ll find a solution.