curl --request PATCH \
  --url https://api.rolla.xyz/api/v1/external/payer-names/{payerNameId}/default \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "isDefault": true
}
'

import requests

url = "https://api.rolla.xyz/api/v1/external/payer-names/{payerNameId}/default"

payload = { "isDefault": True }
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({isDefault: true})
};

fetch('https://api.rolla.xyz/api/v1/external/payer-names/{payerNameId}/default', 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.rolla.xyz/api/v1/external/payer-names/{payerNameId}/default",
  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([
    'isDefault' => true
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <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.rolla.xyz/api/v1/external/payer-names/{payerNameId}/default"

	payload := strings.NewReader("{\n  \"isDefault\": true\n}")

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

	req.Header.Add("X-API-Key", "<api-key>")
	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.rolla.xyz/api/v1/external/payer-names/{payerNameId}/default")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"isDefault\": true\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.rolla.xyz/api/v1/external/payer-names/{payerNameId}/default")

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

request = Net::HTTP::Patch.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"isDefault\": true\n}"

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

{
  "status": 200,
  "message": "Default payer name updated",
  "success": true,
  "data": {
    "id": "9f8e7d6c-5b4a-4938-8271-0a1b2c3d4e5f",
    "type": "business",
    "name": "Acme Trading Ltd",
    "firstName": null,
    "lastName": null,
    "registrationNumber": "RC1234567",
    "registrationDate": "2019-04-02",
    "country": "NG",
    "address": {
      "line1": "14 Marina Road",
      "city": "Lagos",
      "state": "Lagos",
      "postalCode": "101001"
    },
    "status": "active",
    "isDefault": true,
    "decisionNote": null,
    "documents": [],
    "metadata": {
      "vendor_id": "V-4471"
    },
    "createdAt": "2026-09-01T09:14:22.000Z",
    "updatedAt": "2026-09-04T12:00:00.000Z"
  }
}

{
  "status": 400,
  "message": "Only an approved payer name can be set as the default"
}

{
  "status": 400,
  "message": "Validation failed",
  "code": "ACCOUNT_RESTRICTED",
  "errors": [
    {
      "path": [
        "amount"
      ],
      "message": "amount must be a whole number of smallest currency units (e.g. cents)"
    }
  ]
}

{
  "status": 403,
  "message": "Payer names are not enabled for this account. Contact your Rolla account manager to turn them on.",
  "code": "PAYER_NAMES_DISABLED"
}

{
  "status": 404,
  "message": "Payer name not found"
}