All Cielo codes
CIELO · RETURN CODE

Cielo
03

Invalid merchant

Cielo saysIntegration issue
03

Invalid merchant

What it means

Merchant account issue

The merchant account is not set up, not active, or not allowed to process this payment.

What to do

Check the account configuration with your provider.

Don't retry as-isWho can fix it: You, the merchant
Yuno response codeINVALID_MERCHANT
Source:Cielo docs — Códigos de Retorno padrão ABECS (API E-commerce Cielo)

Other Cielo codes with the same meaning

BP176

Reference only. Codes and descriptions come from each provider's public documentation. The Yuno response code is a reference mapping and does not guarantee how a specific transaction is processed.