# Upload opt-in form proof for an appeal

Uploads an opt-in form proof for an appeal.

```http
POST https://api.pozy.ai/v1/sms/registrations/{id}/opt-in-proof
```

- Area: Messaging / SMS
- Auth: Authorization: Bearer pz_live_...

## Path parameters

- `id` (string, required)

## Request body

Content type: `multipart/form-data`

- `file`, string (binary), required

## Example request

```bash
curl -X POST "https://api.pozy.ai/v1/sms/registrations/6bfebd43ddc270f6d2c56fc5/opt-in-proof" \
  -H "Authorization: Bearer $POZY_API_KEY" \
  -F "file=@./photo.jpg"
```

```ts
import { readFile } from "node:fs/promises";

const form = new FormData();
form.append("file", new Blob([await readFile("./photo.jpg")]), "photo.jpg");

const res = await fetch("https://api.pozy.ai/v1/sms/registrations/6bfebd43ddc270f6d2c56fc5/opt-in-proof", {
  method: "POST",
  headers: { Authorization: `Bearer ${process.env.POZY_API_KEY}` },
  body: form,
});
const data = await res.json();
if (!res.ok) throw new Error(data?.error ?? `Request failed with status ${res.status}`);
console.log(data);
```

```python
import os
import requests

resp = requests.post(
    "https://api.pozy.ai/v1/sms/registrations/6bfebd43ddc270f6d2c56fc5/opt-in-proof",
    headers={"Authorization": f"Bearer {os.environ['POZY_API_KEY']}"},
    files={"file": open("photo.jpg", "rb")},
    timeout=30,
)
resp.raise_for_status()
print(resp.json())
```

## Response 200

- `url`, string

```json
{
  "url": "https://pozy.ai/media/example-1.jpg"
}
```