| PIX_REFUND_PAYER_MISMATCH | The refund payer does not match the original transaction. |
| PIX_REFUND_DEADLINE_EXCEEDED | The refund deadline has expired. |
| PIX_REFUND_AMOUNT_EXCEEDED | The requested refund amount exceeds the original amount paid. |
| PIX_REFUND_NOT_ALLOWED | The transaction is not eligible for a refund. |
| PIX_REFUND_TRANSACTION_NOT_COMPLETED | The original transaction has not been completed. |
| PIX_REFUND_TRANSACTION_NOT_FOUND | Transaction not found. |
| PIX_REFUND_ALREADY_PROCESSING | A Pix refund is already being processed for this transaction. |
| PIX_REFUND_ALREADY_SETTLED | The Pix refund has already been settled. |
| PIX_REFUND_RECEIVER_ACCOUNT_INVALID | The receiving account is invalid. |
| PIX_REFUND_RECEIVER_ACCOUNT_UNAVAILABLE | The receiving account is unavailable. |
| PIX_REFUND_RECEIVER_ACCOUNT_CLOSED | The receiving account is closed. |
| PIX_REFUND_RECEIVER_ACCOUNT_NOT_SUPPORTED | The receiving account does not support this refund. |
| PIX_REFUND_AMOUNT_INVALID | The refund amount is invalid. |
| PIX_REFUND_AMOUNT_LIMIT_EXCEEDED | The refund amount exceeds the allowed limit. |
| PIX_REFUND_INSUFFICIENT_BALANCE | Insufficient balance to process the Pix refund. |
| PIX_REFUND_RECEIVER_INFORMATION_INVALID | The receiving account holder information is invalid. |
| PIX_REFUND_PSP_REJECTED | The receiving payment institution rejected the Pix refund. |
| PIX_REFUND_TEMPORARILY_UNAVAILABLE | Pix refunds are temporarily unavailable. |
| PIX_REFUND_DENIED_BY_RECEIVER | The recipient denied the Pix refund. |
| PIX_REFUND_DENIED_BY_FACILITATOR | The payment institution denied the Pix refund. |
| PIX_REFUND_INVALID_DATA | The Pix refund contains invalid data. |
| PIX_REFUND_PROCESSING_ERROR | The Pix refund could not be processed. Please try again later. |
| PIX_REFUND_PROCESSOR_UNAVAILABLE | The Pix refund processor is temporarily unavailable. Please try again later. |
| PIX_REFUND_TIMEOUT | PIX refund timeout for charge 'merchantChargeId'. The refund may still be processed via callback. |