curl --request POST \
  --url https://api.royalti.io/billing/invoices/custom/{id}/mark-paid \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "paymentMethod": "bank_transfer",
  "paymentReference": "TXN-2026-0714-001"
}
'

import requests

url = "https://api.royalti.io/billing/invoices/custom/{id}/mark-paid"

payload = {
    "paymentMethod": "bank_transfer",
    "paymentReference": "TXN-2026-0714-001"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({paymentMethod: 'bank_transfer', paymentReference: 'TXN-2026-0714-001'})
};

fetch('https://api.royalti.io/billing/invoices/custom/{id}/mark-paid', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.royalti.io/billing/invoices/custom/{id}/mark-paid",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'paymentMethod' => 'bank_transfer',
    'paymentReference' => 'TXN-2026-0714-001'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api.royalti.io/billing/invoices/custom/{id}/mark-paid"

	payload := strings.NewReader("{\n  \"paymentMethod\": \"bank_transfer\",\n  \"paymentReference\": \"TXN-2026-0714-001\"\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.royalti.io/billing/invoices/custom/{id}/mark-paid")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"paymentMethod\": \"bank_transfer\",\n  \"paymentReference\": \"TXN-2026-0714-001\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.royalti.io/billing/invoices/custom/{id}/mark-paid")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"paymentMethod\": \"bank_transfer\",\n  \"paymentReference\": \"TXN-2026-0714-001\"\n}"

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

{
  "status": "success",
  "message": "<string>",
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "TenantId": 123,
    "stripeSubscriptionId": "<string>",
    "stripeInvoiceId": "<string>",
    "invoiceType": "subscription",
    "invoiceNumber": "<string>",
    "description": "<string>",
    "lineItems": [
      {}
    ],
    "amount": 123,
    "taxAmount": 123,
    "discountAmount": 123,
    "totalAmount": 123,
    "currency": "USD",
    "status": "draft",
    "dueDate": "2023-11-07T05:31:56Z",
    "paidDate": "2023-11-07T05:31:56Z",
    "createdBy": "<string>",
    "paymentMethod": "<string>",
    "referenceNumber": "<string>",
    "paymentReference": "<string>",
    "notes": "<string>",
    "metadata": {},
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z"
  }
}

{
  "status": "error",
  "message": "<string>",
  "code": "<string>",
  "details": {}
}

{
  "status": "error",
  "message": "<string>",
  "code": "<string>",
  "details": {}
}