curl --request PATCH \
  --url https://api.paywise.de/mahnservice/v1/invoices/{uuid}/ \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "invoice_number": "<string>",
  "amount": "<string>",
  "currency": "EUR",
  "due_date": "2023-12-25",
  "document_date": "2023-12-25",
  "your_reference": "<string>",
  "debtor": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}
'

import requests

url = "https://api.paywise.de/mahnservice/v1/invoices/{uuid}/"

payload = {
    "invoice_number": "<string>",
    "amount": "<string>",
    "currency": "EUR",
    "due_date": "2023-12-25",
    "document_date": "2023-12-25",
    "your_reference": "<string>",
    "debtor": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    invoice_number: '<string>',
    amount: '<string>',
    currency: 'EUR',
    due_date: '2023-12-25',
    document_date: '2023-12-25',
    your_reference: '<string>',
    debtor: '3c90c3cc-0d44-4b50-8888-8dd25736052a'
  })
};

fetch('https://api.paywise.de/mahnservice/v1/invoices/{uuid}/', 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.paywise.de/mahnservice/v1/invoices/{uuid}/",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'invoice_number' => '<string>',
    'amount' => '<string>',
    'currency' => 'EUR',
    'due_date' => '2023-12-25',
    'document_date' => '2023-12-25',
    'your_reference' => '<string>',
    'debtor' => '3c90c3cc-0d44-4b50-8888-8dd25736052a'
  ]),
  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.paywise.de/mahnservice/v1/invoices/{uuid}/"

	payload := strings.NewReader("{\n  \"invoice_number\": \"<string>\",\n  \"amount\": \"<string>\",\n  \"currency\": \"EUR\",\n  \"due_date\": \"2023-12-25\",\n  \"document_date\": \"2023-12-25\",\n  \"your_reference\": \"<string>\",\n  \"debtor\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n}")

	req, _ := http.NewRequest("PATCH", 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.patch("https://api.paywise.de/mahnservice/v1/invoices/{uuid}/")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"invoice_number\": \"<string>\",\n  \"amount\": \"<string>\",\n  \"currency\": \"EUR\",\n  \"due_date\": \"2023-12-25\",\n  \"document_date\": \"2023-12-25\",\n  \"your_reference\": \"<string>\",\n  \"debtor\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.paywise.de/mahnservice/v1/invoices/{uuid}/")

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

request = Net::HTTP::Patch.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"invoice_number\": \"<string>\",\n  \"amount\": \"<string>\",\n  \"currency\": \"EUR\",\n  \"due_date\": \"2023-12-25\",\n  \"document_date\": \"2023-12-25\",\n  \"your_reference\": \"<string>\",\n  \"debtor\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n}"

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

{
  "id": "71000000-0000-4000-8000-000000000001",
  "invoice_number": "INV-2026-1042",
  "amount": "250.00",
  "currency": "EUR",
  "due_date": "2026-09-01",
  "document_date": "2026-08-18",
  "your_reference": "CUSTOMER-1042",
  "debtor": "72000000-0000-4000-8000-000000000001",
  "access_mode": "production",
  "dunning_state": "held",
  "archived": false,
  "has_document": false,
  "document": null,
  "balance": "250.00",
  "paid_amount": "0.00",
  "overpaid": false,
  "created": "2026-09-02T08:00:00Z",
  "updated": "2026-09-02T08:00:00Z"
}

{
  "detail": "<string>",
  "code": "<string>",
  "errors": [
    {
      "field": "<string>",
      "code": "<string>",
      "message": "<string>"
    }
  ]
}

{
  "detail": "<string>",
  "code": "<string>",
  "errors": [
    {
      "field": "<string>",
      "code": "<string>",
      "message": "<string>"
    }
  ]
}

{
  "detail": "<string>",
  "code": "<string>",
  "errors": [
    {
      "field": "<string>",
      "code": "<string>",
      "message": "<string>"
    }
  ]
}

{
  "detail": "<string>",
  "code": "<string>",
  "errors": [
    {
      "field": "<string>",
      "code": "<string>",
      "message": "<string>"
    }
  ]
}

{
  "detail": "<string>",
  "code": "<string>",
  "errors": [
    {
      "field": "<string>",
      "code": "<string>",
      "message": "<string>"
    }
  ]
}

{
  "detail": "<string>",
  "code": "<string>",
  "errors": [
    {
      "field": "<string>",
      "code": "<string>",
      "message": "<string>"
    }
  ]
}

{
  "detail": "<string>",
  "code": "<string>",
  "errors": [
    {
      "field": "<string>",
      "code": "<string>",
      "message": "<string>"
    }
  ]
}