curl --request GET \
  --url https://api.sandbox.paypathiq.com/v1/clients/{clientCode}/write-offs/{externalEventId} \
  --header 'Authorization: Bearer <token>'

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.sandbox.paypathiq.com/v1/clients/{clientCode}/write-offs/{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}/write-offs/{externalEventId}"

headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

package main

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

func main() {

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

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

	req.Header.Add("Authorization", "Bearer <token>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://api.sandbox.paypathiq.com/v1/clients/{clientCode}/write-offs/{externalEventId}")
  .header("Authorization", "Bearer <token>")
  .asString();

using RestSharp;


var options = new RestClientOptions("https://api.sandbox.paypathiq.com/v1/clients/{clientCode}/write-offs/{externalEventId}");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "Bearer <token>");
var response = await client.GetAsync(request);

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

{
  "type": "write_off",
  "amount": {
    "amount": "10.00",
    "currency": "EUR"
  },
  "externalReceivableId": "REC_EXAMPLE",
  "sourceRevision": 2,
  "effectiveAt": "2026-10-14T12:00:00Z",
  "reason": "approved_write_off",
  "sourceReference": "CREDIT_SOURCE",
  "externalEventId": "EVENT_EXAMPLE",
  "acceptedAt": "2026-10-14T12:00:01Z"
}

{
  "detail": "Request body is not valid JSON.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 400,
  "title": "Request body is not valid JSON.",
  "type": "https://docs.paypathiq.com/problems/malformed_json"
}

{
  "detail": "API key is invalid, inactive, revoked, or for another environment.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 401,
  "title": "API key is invalid, inactive, revoked, or for another environment.",
  "type": "https://docs.paypathiq.com/problems/invalid_api_key"
}

{
  "detail": "The Client code is unknown, the grant lacks the required scope, or the calling address is outside the grant's IP allowlist.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 403,
  "title": "The Client code is unknown, the grant lacks the required scope, or the calling address is outside the grant's IP allowlist.",
  "type": "https://docs.paypathiq.com/problems/client_scope_denied"
}

{
  "detail": "No evidence exists at this authorized resource URL.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 404,
  "title": "No evidence exists at this authorized resource URL.",
  "type": "https://docs.paypathiq.com/problems/financial_event_not_found"
}

{
  "detail": "Request body exceeds the 256 KiB resource limit.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 413,
  "title": "Request body exceeds the 256 KiB resource limit.",
  "type": "https://docs.paypathiq.com/problems/request_too_large"
}

{
  "detail": "Media type or content encoding is unsupported. Send uncompressed application/json for PUT and POST, and application/merge-patch+json for PATCH.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 415,
  "title": "Media type or content encoding is unsupported. Send uncompressed application/json for PUT and POST, and application/merge-patch+json for PATCH.",
  "type": "https://docs.paypathiq.com/problems/unsupported_media_type"
}

{
  "detail": "Route parameters or the representation are invalid. Route parameters are checked before authentication. Field errors carry a code such as invalid_format, unrecognized_keys, custom, sensitive_external_id, or sensitive_source_reference.",
  "errors": [
    {
      "code": "invalid_format",
      "detail": "Invalid ISO date",
      "pointer": "/dueDate"
    }
  ],
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 422,
  "title": "Route parameters or the representation are invalid. Route parameters are checked before authentication. Field errors carry a code such as invalid_format, unrecognized_keys, custom, sensitive_external_id, or sensitive_source_reference.",
  "type": "https://docs.paypathiq.com/problems/validation_error"
}

{
  "detail": "Each API key may send 60 requests per minute and run 1 request at a time. In sandbox, the same limits also apply per Client across all of its keys. Every request, including GET, counts.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 429,
  "title": "Each API key may send 60 requests per minute and run 1 request at a time. In sandbox, the same limits also apply per Client across all of its keys. Every request, including GET, counts.",
  "type": "https://docs.paypathiq.com/problems/rate_limit_exceeded"
}

{
  "detail": "An unexpected error prevented a safe commit, and nothing was saved. Retry with backoff.",
  "requestId": "29400000-0000-4000-8000-000000000001",
  "status": 503,
  "title": "An unexpected error prevented a safe commit, and nothing was saved. Retry with backoff.",
  "type": "https://docs.paypathiq.com/problems/projection_unavailable"
}