There are a few potential reasons why Amazon may not be accepting your payment method: Expired or incorrect card details - Payment will be declined if the credit/debit card on file has expired or the details entered are wrong. Double-check check card info is current. Insufficient funds - There may not be enough funds in your connected bank account to cover owed fees. Check your balance and replenish. Card authorization failure - Sometimes, card verification fails, which blocks payments. Try a different card or contact your bank. Billing address mismatch - The billing address on your account must match the card details. Update addresses if needed. Payment limits - Some payment methods have usage limits that may block high fee charges. Try splitting between multiple cards. Account flags - Suspicious activity or an account under review may trigger payment rejections. Address issues to clear flags. Payment method is outdated - Amazon may stop supporting outdated or uncommon payment methods, causing declines.