# Acknowledging MO's and DR's

Upon receiving the MO / DR notification, your server needs to respond with a HTTP 200, and a body of either: “0” (ZERO), "OK" or "SUCCESS".

| Response Status Code | Body      | Result  |
| -------------------- | --------- | ------- |
| HTTP 200             | "0"       | 0       |
| HTTP 200             | "OK"      | OK      |
| HTTP 200             | "SUCCESS" | SUCCESS |

{% tabs %}
{% tab title="Python" %}

```python
# Send HTTP 200 response with body "0"
    return HttpResponse("0", status=200)
```

{% endtab %}

{% tab title="NodeJS" %}

```javascript
const express = require('express');
const app = express();

app.get('/', (req, res) => {
  res.status(200).send('0');
});
```

{% endtab %}
{% endtabs %}