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🔧 Payment Processing

Clover POS Error Codes — Complete Reference Guide

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Clover displays various error codes during payment processing, device operation, and connectivity events. This guide covers the most common Clover error codes and their specific fixes.

🔢 Step-by-Step Instructions

  1. 'Do Not Honor' — customer's bank declined the transaction. Fix: advise customer to use a different card or contact their bank.
  2. 'Invalid Card' — the card number is not recognized. Fix: re-enter the card number manually or ask the customer to use a different card.
  3. 'Expired Card' — the card's expiration date has passed. Fix: customer must use a valid, unexpired card.
  4. 'Network Error' or 'Connection Timeout' — Clover cannot reach payment servers. Fix: check your internet connection and verify at status.clover.com.
  5. 'Card Read Error' — chip or swipe could not be read. Fix: clean the card reader slot, retry, or use tap-to-pay if available.
  6. 'Insufficient Funds' — card does not have enough balance. Fix: ask the customer to use a different payment method.
  7. 'REJECT 203' — security hold by issuing bank. Fix: customer should contact their bank immediately. Do not retry multiple times.
  8. 'Merchant Not Activated' — merchant account setup incomplete. Fix: contact your processor to confirm account activation status.
  9. 'Rate Limit Exceeded' — too many API requests in a short period. Fix: allow a few minutes before retrying, or contact KloverSupport for app-level troubleshooting.
📌 Important Note: If you see an error code not listed here, note the exact code and description and contact KloverSupport. Our AI can look up any Clover error code in real time and provide device-specific guidance.

❓ Frequently Asked Questions

Clover's Help Center at clover.com/help documents many error codes. KloverSupport also maintains a comprehensive error database updated with the latest codes.
Check dashboard.clover.com > Transactions immediately. A completed authorization appears even if the terminal showed an error. Verify before re-processing.
Not natively. Some third-party monitoring apps in the App Market can send alerts for specific transaction failures or device errors.

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