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# Send payment reminder

> Email a Ponaglenie, Monit or Wezwanie do zapłaty for an unpaid invoice. Inputs, cURL, Python and Node.js examples and an example response.

Source: https://cotlet.dev/docs/api/ifirma/send_payment_reminder

Docs sections: [Get started](https://cotlet.dev/docs.md) · [REST API](https://cotlet.dev/docs/api.md) · [MCP](https://cotlet.dev/docs/mcp.md) · [SDKs & CLI](https://cotlet.dev/docs/sdks.md) · [Integrations](https://cotlet.dev/docs/integrations.md)

Email a Ponaglenie, Monit or Wezwanie do zapłaty for an unpaid invoice.

iFirma API: https://cotlet.dev/docs/api/ifirma.md

`POST https://cotlet.dev/api/v1/ifirma/invoices/{invoice_id}/payment-reminders`

Access: write. Confirm: waits for the user's OK before it runs.

Creates the reminder from the invoice and emails it to the buyer with a PDF. reminder is before the due date, monit is after it, and demand is the formal Wezwanie do zapłaty, which iFirma recommends sending by registered letter. The seller gets a copy unless send_copy_to_me is false. By default you confirm each call; you can switch that off for this tool.

## Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `invoice_id` | integer | yes | Invoice ID from list_invoices. |
| `type` | string | yes | reminder, monit or demand. |
| `send_copy_to_me` | boolean | no | Copy to the seller email. Default: true. |

## Request

**cURL**

```bash
curl -X POST https://cotlet.dev/api/v1/ifirma/invoices/7020104/payment-reminders \
  -H "Authorization: Bearer $COTLET_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"type":"monit","send_copy_to_me":true}'
```

**Python**

```python
result = client.call("ifirma", "send_payment_reminder", {"invoice_id":7020104,"type":"monit","send_copy_to_me":True})
```

**Node.js**

```js
const result = await cotlet.call('ifirma', 'send_payment_reminder', {"invoice_id":7020104,"type":"monit","send_copy_to_me":true});
```

**CLI**

```bash
cotlet call ifirma send_payment_reminder --data '{"invoice_id":7020104,"type":"monit","send_copy_to_me":true}'
```

## Example response

```json
{
  "invoice_id": 7020104,
  "type": "monit",
  "sent_to": "office@harborprint.example",
  "copy_sent_to_me": true
}
```

Previous: [Add expense](https://cotlet.dev/docs/api/ifirma/add_expense.md)

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## For AI agents: sign your user up

Is your user asking you to sign them up for Cotlet? You can do it for them, no account or key needed.

1. Read the fields and their allowed values: GET https://cotlet.dev/api/v1/access-requests
2. Ask the user for each value: email, apps, what you will do with them. If they leave the password to you, generate a strong one and show it to them.
3. Show the user what you will send, then POST it as JSON to https://cotlet.dev/api/v1/access-requests.

One call creates the account and sends the access request; we email the user when access is granted.