> ## Documentation Index
> Fetch the complete documentation index at: https://docs.alignet.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Query and cancellation

> Query transactions and cancel or reverse existing operations.

## Query an operation

The query response includes the transactions associated with an operation. Relevant data includes:

* `transaction_id`: unique transaction identifier.
* `channel`: channel used, such as `ecommerce`.
* `state` and `state_reason`: current status and details.
* Transaction amount and currency.
* Payment method and authentication data when applicable.

Documented statuses include `PENDIENTE`, `INVALIDO`, `AUTORIZADO`, `DENEGADO`, `CANCELADO`, `EXPIRADO`, and `LIQUIDADO`.

## Cancellation or reversal

```http theme={"system"}
DELETE {{base}}/charges/{{merchant_code}}/{{merchant_operation_number}}
```

| Data                        | Description                                   |
| --------------------------- | --------------------------------------------- |
| `merchant_code`             | Merchant identifier.                          |
| `merchant_operation_number` | Original operation number.                    |
| `Authorization`             | Previously obtained Bearer token.             |
| `ALG-API-VERSION`           | Agreed API version.                           |
| `payment-facilitator-code`  | Identifier required for Payment Facilitators. |

| Original status             | Result      | Documented methods                                             |
| --------------------------- | ----------- | -------------------------------------------------------------- |
| `REGISTRADO` or `PENDIENTE` | `CANCELADO` | CARD Redirect, CUOTEALO, QR, BANK\_TRANSFER, and PAGOEFECTIVO. |
| `AUTORIZADO`                | `EXTORNADO` | CARD and YAPE.                                                 |

<Warning>Always verify the final status in the response or through a later query before updating the merchant order.</Warning>