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# Mark as paid

POST https://api.md.tiankii.com/v1/invoice/{id}/mark-as-paid

## Mark a CASH invoice as paid

Manually settles the invoice `:id` when it was collected in **cash**. It moves the invoice to `Paid`, runs the whole paid-invoice pipeline (notifications, webhooks, settlement) and broadcasts the change over the websocket gateway.

### Auth

`x-api-key` header with **`Merchant.invoice.patch`**. Also accepts JWT user, POS JWT and limited JWT tokens.

### Path params

* `id` (required): the invoice id.

### Errors

* **400** `Invoice is already in a paid status.`
* **403** `You do not have permission to modify this invoice.` — the invoice belongs to another store.
* **400** — the invoice's resolved payment method is not `CASH`.

There is **no request body**.

### Side effects

Sets the status to `Paid`, records a `MANUALLY_MARKED_AS_PAID` invoice event with the acting user id and runs `handlePaidInvoice`. Response: `{ status: "marked-as-paid" }`.

***

**Notas:** Handler: statusService.markAsPaid(user, id, body?.storeId). Only invoices whose resolved payment method is CASH can be marked as paid. MarkAsPaidDto exposes an optional `storeId`, but getValidStoreId ignores it for non-POS callers (API key included) and always uses the store resolved from the credentials — so it is not documented as a body field. Replaces the deprecated PATCH /v1/invoice/:id/mark-as-paid, which took storeId as a query param.

Reference: https://docs.tiankii.com/api-reference/tiankii-api-api-key/invoice/mark-as-paid

## Authentication

- `x-api-key` header (required)

## Request

### Path parameters

- `id` (string, required) — Id of the CASH invoice to settle manually.

### Headers

- `x-application-account-id` (string, optional) — Scope the request to a specific store / account instead of the one resolved from the API key. Aliases: the `x-account-id` header, or the `application_account_id` / `account_id` query parameter.

## Examples

**SDK Code**

```python
import requests

url = "https://api.md.tiankii.com/v1/invoice/inv_7f3a9c21/mark-as-paid"

headers = {
    "x-application-account-id": "acct_3f9a21c7",
    "x-api-key": "<apiKey>"
}

response = requests.post(url, headers=headers)

print(response.json())
```

```javascript
const url = 'https://api.md.tiankii.com/v1/invoice/inv_7f3a9c21/mark-as-paid';
const options = {
  method: 'POST',
  headers: {'x-application-account-id': 'acct_3f9a21c7', 'x-api-key': '<apiKey>'}
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.md.tiankii.com/v1/invoice/inv_7f3a9c21/mark-as-paid"

	req, _ := http.NewRequest("POST", url, nil)

	req.Header.Add("x-application-account-id", "acct_3f9a21c7")
	req.Header.Add("x-api-key", "<apiKey>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.md.tiankii.com/v1/invoice/inv_7f3a9c21/mark-as-paid")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["x-application-account-id"] = 'acct_3f9a21c7'
request["x-api-key"] = '<apiKey>'

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.md.tiankii.com/v1/invoice/inv_7f3a9c21/mark-as-paid")
  .header("x-application-account-id", "acct_3f9a21c7")
  .header("x-api-key", "<apiKey>")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.md.tiankii.com/v1/invoice/inv_7f3a9c21/mark-as-paid', [
  'headers' => [
    'x-api-key' => '<apiKey>',
    'x-application-account-id' => 'acct_3f9a21c7',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.md.tiankii.com/v1/invoice/inv_7f3a9c21/mark-as-paid");
var request = new RestRequest(Method.POST);
request.AddHeader("x-application-account-id", "acct_3f9a21c7");
request.AddHeader("x-api-key", "<apiKey>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "x-application-account-id": "acct_3f9a21c7",
  "x-api-key": "<apiKey>"
]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.md.tiankii.com/v1/invoice/inv_7f3a9c21/mark-as-paid")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```