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# Cancel invoice

> Cancel an issued invoice by creating a storno invoice with a reason. Input schema, a tools/call example and an example result.

Source: https://cotlet.dev/docs/mcp/szamlazz-hu/cancel_invoice

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)

Cancel an issued invoice by creating a storno invoice with a reason.

Számlázz.hu MCP tools: https://cotlet.dev/docs/mcp/szamlazz-hu.md

MCP tool: `szamlazz_hu_write → cancel_invoice`

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

Creates a storno invoice for the original, with the same delivery date, and adds your reason to it. Returns the storno invoice number and the amounts. The storno is a legal document that goes to NAV, which accepts it only if the original was submitted successfully. A storno made by mistake is fixed in the app, not by this tool. By default you confirm each call; you can switch that off for this tool.

## Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `invoice_number` | string | yes | Invoice number as shown in Outgoing invoices, from list_invoices. |
| `reason` | string | no | Reason for the storno, printed on the storno invoice. |

## tools/call

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "szamlazz_hu_write",
    "arguments": {
      "operation": "cancel_invoice",
      "arguments": {
        "invoice_number": "ABC-2026-00131",
        "reason": "Duplicate order"
      }
    }
  }
}
```

## Example response

```json
{
  "content": [
    {
      "type": "text",
      "text": "{ ... same JSON as structuredContent ... }"
    }
  ],
  "structuredContent": {
    "storno_invoice_number": "ABC-2026-00149",
    "original_invoice_number": "ABC-2026-00131",
    "reason": "Duplicate order",
    "gross": -127000,
    "currency": "HUF"
  },
  "isError": false
}
```

Previous: [Create invoice](https://cotlet.dev/docs/mcp/szamlazz-hu/create_invoice.md)
Next: [Record payment](https://cotlet.dev/docs/mcp/szamlazz-hu/record_payment.md)

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