> Code 30 - Format error The payment was declined by the buyer's bank due to reason 30 - Format error This decline message indicates a technical error. What can you do? Contact our technical support to resolve the problem. Updated 20 October 2026 13:10 Related articles > Code 51 - Insufficient balance or exceeded credit limit Proof of a payment or refund rejected > Code 60 - The acceptor of the card must contact the acquirer > Code 05 - Do not honor > Code 13 - Montant Invalide