curl --request PUT \
  --url https://api.sandbox.paypathiq.com/v1/clients/{clientCode}/credit-notes/{externalEventId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "type": "credit_note",
  "amount": {
    "amount": "10.00",
    "currency": "EUR"
  },
  "externalReceivableId": "REC_EXAMPLE",
  "sourceRevision": 2,
  "effectiveAt": "2026-10-14T12:00:00Z",
  "reason": "billing_correction",
  "sourceReference": "CREDIT_SOURCE"
}
'

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    type: 'credit_note',
    amount: {amount: '10.00', currency: 'EUR'},
    externalReceivableId: 'REC_EXAMPLE',
    sourceRevision: 2,
    effectiveAt: '2026-10-14T12:00:00Z',
    reason: 'billing_correction',
    sourceReference: 'CREDIT_SOURCE'
  })
};

fetch('https://api.sandbox.paypathiq.com/v1/clients/{clientCode}/credit-notes/{externalEventId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.sandbox.paypathiq.com/v1/clients/{clientCode}/credit-notes/{externalEventId}"

payload = {
    "type": "credit_note",
    "amount": {
        "amount": "10.00",
        "currency": "EUR"
    },
    "externalReceivableId": "REC_EXAMPLE",
    "sourceRevision": 2,
    "effectiveAt": "2026-10-14T12:00:00Z",
    "reason": "billing_correction",
    "sourceReference": "CREDIT_SOURCE"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

package main

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

func main() {

	url := "https://api.sandbox.paypathiq.com/v1/clients/{clientCode}/credit-notes/{externalEventId}"

	payload := strings.NewReader("{\n  \"type\": \"credit_note\",\n  \"amount\": {\n    \"amount\": \"10.00\",\n    \"currency\": \"EUR\"\n  },\n  \"externalReceivableId\": \"REC_EXAMPLE\",\n  \"sourceRevision\": 2,\n  \"effectiveAt\": \"2026-10-14T12:00:00Z\",\n  \"reason\": \"billing_correction\",\n  \"sourceReference\": \"CREDIT_SOURCE\"\n}")

	req, _ := http.NewRequest("PUT", 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.put("https://api.sandbox.paypathiq.com/v1/clients/{clientCode}/credit-notes/{externalEventId}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"type\": \"credit_note\",\n  \"amount\": {\n    \"amount\": \"10.00\",\n    \"currency\": \"EUR\"\n  },\n  \"externalReceivableId\": \"REC_EXAMPLE\",\n  \"sourceRevision\": 2,\n  \"effectiveAt\": \"2026-10-14T12:00:00Z\",\n  \"reason\": \"billing_correction\",\n  \"sourceReference\": \"CREDIT_SOURCE\"\n}")
  .asString();

using RestSharp;


var options = new RestClientOptions("https://api.sandbox.paypathiq.com/v1/clients/{clientCode}/credit-notes/{externalEventId}");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "Bearer <token>");
request.AddJsonBody("{\n  \"type\": \"credit_note\",\n  \"amount\": {\n    \"amount\": \"10.00\",\n    \"currency\": \"EUR\"\n  },\n  \"externalReceivableId\": \"REC_EXAMPLE\",\n  \"sourceRevision\": 2,\n  \"effectiveAt\": \"2026-10-14T12:00:00Z\",\n  \"reason\": \"billing_correction\",\n  \"sourceReference\": \"CREDIT_SOURCE\"\n}", false);
var response = await client.PutAsync(request);

Console.WriteLine("{0}", response.Content);