All Cielo codes
CIELO · RETURN CODE

Cielo
21

Cancellation not performed: transaction not found.

Cielo saysIntegration issue
21

Cancellation not performed: transaction not found.

What it means

Transaction not found

The provider could not find the payment you referenced.

What to do

Check the identifier, the environment and the account it belongs to.

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

Other Cielo codes with the same meaning

003

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.