curl --request POST \
  --url https://api-sandbox.revolv3.com/api/Invoices/{invoiceId}/refund \
  --header 'Content-Type: application/json-patch+json' \
  --header 'x-revolv3-token: <api-key>' \
  --data '
{
  "amount": 5,
  "includeRawProcessorResponse": false,
  "reportGroup": null
}
'

import requests

url = "https://api-sandbox.revolv3.com/api/Invoices/{invoiceId}/refund"

payload = {
    "amount": 5,
    "includeRawProcessorResponse": False,
    "reportGroup": None
}
headers = {
    "x-revolv3-token": "<api-key>",
    "Content-Type": "application/json-patch+json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-revolv3-token': '<api-key>', 'Content-Type': 'application/json-patch+json'},
  body: JSON.stringify({amount: 5, includeRawProcessorResponse: false, reportGroup: null})
};

fetch('https://api-sandbox.revolv3.com/api/Invoices/{invoiceId}/refund', 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-sandbox.revolv3.com/api/Invoices/{invoiceId}/refund",
  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([
    'amount' => 5,
    'includeRawProcessorResponse' => false,
    'reportGroup' => null
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json-patch+json",
    "x-revolv3-token: <api-key>"
  ],
]);

$response = curl_exec($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-sandbox.revolv3.com/api/Invoices/{invoiceId}/refund"

	payload := strings.NewReader("{\n  \"amount\": 5,\n  \"includeRawProcessorResponse\": false,\n  \"reportGroup\": null\n}")

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

	req.Header.Add("x-revolv3-token", "<api-key>")
	req.Header.Add("Content-Type", "application/json-patch+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-sandbox.revolv3.com/api/Invoices/{invoiceId}/refund")
  .header("x-revolv3-token", "<api-key>")
  .header("Content-Type", "application/json-patch+json")
  .body("{\n  \"amount\": 5,\n  \"includeRawProcessorResponse\": false,\n  \"reportGroup\": null\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api-sandbox.revolv3.com/api/Invoices/{invoiceId}/refund")

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

request = Net::HTTP::Post.new(url)
request["x-revolv3-token"] = '<api-key>'
request["Content-Type"] = 'application/json-patch+json'
request.body = "{\n  \"amount\": 5,\n  \"includeRawProcessorResponse\": false,\n  \"reportGroup\": null\n}"

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

{
  "invoice": {
    "invoiceId": 2,
    "parentInvoiceId": 1,
    "customerId": 1,
    "merchantInvoiceRefId": "3b9d3059-4329-4c4b-b3ab-7dabc39aeded",
    "paymentMethod": {
      "paymentMethodId": 1,
      "billingAddressId": 1,
      "billingFirstName": "John",
      "billingLastName": "Doe",
      "merchantPaymentMethodRefId": null,
      "billingAddress": {
        "addressId": 1,
        "addressLine1": "1 Default Street",
        "addressLine2": null,
        "city": "Los Angeles",
        "state": "CA",
        "postalCode": "90210",
        "phoneNumber": null,
        "email": null,
        "country": "US"
      },
      "paymentMethodAchDetails": null,
      "paymentMethodCreditCardDetails": null
    },
    "invoiceStatus": "PartialRefund",
    "subtotal": 10.99,
    "tax": 0.1,
    "total": 11.09,
    "billingDate": "10/11/2026",
    "merchantLegalName": "John Doe",
    "merchantCustomerRefId": "457b19c5-27a9-43de-843c-a11f12b87056",
    "customerFirstName": "John",
    "customerLastName": "Doe",
    "subscriptionId": null,
    "installmentId": null,
    "eligibilityFailReason": null,
    "merchantSubscriptionRefId": null,
    "networkTransactionId": null,
    "currency": null,
    "invoiceLineItems": null,
    "invoiceAttempts": null,
    "voidAttempts": null
  },
  "refunds": [
    {
      "invoiceAttemptId": 1,
      "amount": -3.99,
      "invoiceAttemptStatus": "Success",
      "invoiceAttemptDate": "2026-10-12T10:23:44.4044845Z",
      "paymentProcessor": "BridgePay",
      "processorTransactionId": null,
      "responseCode": null,
      "responseMessage": null,
      "processorRawResponse": null,
      "paymentMethod": {
        "paymentMethodId": 0,
        "billingAddressId": 0,
        "billingAddress": null,
        "billingFirstName": null,
        "billingLastName": null,
        "merchantPaymentMethodRefId": null,
        "paymentMethodAchDetails": null,
        "paymentMethodCreditCardDetails": null
      },
      "descriptor": {
        "subMerchantId": null,
        "subMerchantName": null,
        "subMerchantPhone": null,
        "countryCode": null,
        "city": null
      },
      "eligibilityCheckOrderCode": null,
      "processorMerchantId": null,
      "processingMethod": "None",
      "revolv3ResponseCode": null,
      "revolv3ResponseMessage": null,
      "authCode": null,
      "processorResponseDateTime": "2026-10-12T10:23:44.4044845Z"
    }
  ],
  "refundedSubtotal": 5.99,
  "refundedTax": 0.05,
  "refundedTotal": 6.04,
  "rawResponse": null,
  "message": null,
  "responseCode": null,
  "responseMessage": null,
  "revolv3ResponseCode": null,
  "revolv3ResponseMessage": null
}

{
  "message": "Unable to perform the request action with provided data."
}

{
  "message": "Attempted to perform an unauthorized operation."
}

{
  "message": "Unable to find an entity with the provided data."
}

{
  "message": "Unable to process this operation."
}