Suspend a cardholder
curl --request POST \
--url https://api.fyatu.com/api/v3.20/cardholders/{id}/suspend \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"reason": "Suspected fraudulent activity"
}
'import requests
url = "https://api.fyatu.com/api/v3.20/cardholders/{id}/suspend"
payload = { "reason": "Suspected fraudulent activity" }
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({reason: 'Suspected fraudulent activity'})
};
fetch('https://api.fyatu.com/api/v3.20/cardholders/{id}/suspend', 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.fyatu.com/api/v3.20/cardholders/{id}/suspend",
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([
'reason' => 'Suspected fraudulent activity'
]),
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.fyatu.com/api/v3.20/cardholders/{id}/suspend"
payload := strings.NewReader("{\n \"reason\": \"Suspected fraudulent activity\"\n}")
req, _ := http.NewRequest("POST", 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.post("https://api.fyatu.com/api/v3.20/cardholders/{id}/suspend")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"reason\": \"Suspected fraudulent activity\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.fyatu.com/api/v3.20/cardholders/{id}/suspend")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"reason\": \"Suspected fraudulent activity\"\n}"
response = http.request(request)
puts response.read_body{
"success": true,
"status": 200,
"message": "Cardholder suspended",
"data": {
"cardholderId": "chl_01HXYZ1234ABCDEF5678",
"firstName": "John",
"lastName": "Smith",
"email": "john.smith@example.com",
"status": "SUSPENDED",
"kycStatus": "APPROVED",
"suspendedAt": "2026-05-20T14:00:00Z",
"totalCards": 2,
"createdAt": "2026-05-01T09:00:00Z",
"updatedAt": "2026-05-20T14:00:00Z"
},
"meta": {
"requestId": "req_a1b2c3d4e5f6a7b8c9d0e1f2",
"platform": "Fyatu CaaS",
"timestamp": "2026-05-20T14:00:00Z"
}
}Cardholders
Suspend Cardholder
Suspend a cardholder, blocking all their cards from transacting. POST /cardholders//suspend. Requires cardholders:write scope.
POST
/
cardholders
/
{id}
/
suspend
Suspend a cardholder
curl --request POST \
--url https://api.fyatu.com/api/v3.20/cardholders/{id}/suspend \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"reason": "Suspected fraudulent activity"
}
'import requests
url = "https://api.fyatu.com/api/v3.20/cardholders/{id}/suspend"
payload = { "reason": "Suspected fraudulent activity" }
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({reason: 'Suspected fraudulent activity'})
};
fetch('https://api.fyatu.com/api/v3.20/cardholders/{id}/suspend', 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.fyatu.com/api/v3.20/cardholders/{id}/suspend",
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([
'reason' => 'Suspected fraudulent activity'
]),
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.fyatu.com/api/v3.20/cardholders/{id}/suspend"
payload := strings.NewReader("{\n \"reason\": \"Suspected fraudulent activity\"\n}")
req, _ := http.NewRequest("POST", 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.post("https://api.fyatu.com/api/v3.20/cardholders/{id}/suspend")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"reason\": \"Suspected fraudulent activity\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.fyatu.com/api/v3.20/cardholders/{id}/suspend")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"reason\": \"Suspected fraudulent activity\"\n}"
response = http.request(request)
puts response.read_body{
"success": true,
"status": 200,
"message": "Cardholder suspended",
"data": {
"cardholderId": "chl_01HXYZ1234ABCDEF5678",
"firstName": "John",
"lastName": "Smith",
"email": "john.smith@example.com",
"status": "SUSPENDED",
"kycStatus": "APPROVED",
"suspendedAt": "2026-05-20T14:00:00Z",
"totalCards": 2,
"createdAt": "2026-05-01T09:00:00Z",
"updatedAt": "2026-05-20T14:00:00Z"
},
"meta": {
"requestId": "req_a1b2c3d4e5f6a7b8c9d0e1f2",
"platform": "Fyatu CaaS",
"timestamp": "2026-05-20T14:00:00Z"
}
}Overview
Suspends an active cardholder. While suspended, all cards issued to the cardholder are immediately blocked — transactions will be declined at the network level. Suspension is reversible viaPOST /cardholders/{id}/reactivate.
Path Parameters
| Parameter | Type | Description |
|---|---|---|
id | string | The cardholder ID (prefix chl_) |
Request Body (optional)
| Field | Type | Constraint | Description |
|---|---|---|---|
reason | string | Max 500 characters | Internal reason for suspension (not shown to cardholder) |
{} is also valid — reason is optional.
Example
curl -X POST https://api.fyatu.com/api/v3.20/cardholders/chl_01HXYZ1234ABCDEF5678/suspend \
-H "Authorization: Bearer $FYATU_API_KEY" \
-H "Content-Type: application/json" \
-d '{ "reason": "Flagged by fraud engine — pending review" }'
const resp = await fetch(
'https://api.fyatu.com/api/v3.20/cardholders/chl_01HXYZ1234ABCDEF5678/suspend',
{
method: 'POST',
headers: {
'Authorization': `Bearer ${process.env.FYATU_API_KEY}`,
'Content-Type': 'application/json'
},
body: JSON.stringify({ reason: 'Flagged by fraud engine — pending review' })
}
);
const body = await resp.json();
console.log(body.data.status); // "SUSPENDED"
console.log(body.data.suspendedAt); // "2026-05-22T10:00:00Z"
import os, requests
resp = requests.post(
'https://api.fyatu.com/api/v3.20/cardholders/chl_01HXYZ1234ABCDEF5678/suspend',
headers={'Authorization': f'Bearer {os.environ["FYATU_API_KEY"]}'},
json={'reason': 'Flagged by fraud engine — pending review'}
)
cardholder = resp.json()['data']
print(cardholder['status']) # SUSPENDED
print(cardholder['suspendedAt'])
Success Response (200)
Returns the full updated cardholder object withstatus: SUSPENDED:
{
"success": true,
"status": 200,
"message": "Cardholder suspended",
"data": {
"cardholderId": "chl_01HXYZ1234ABCDEF5678",
"programId": "prg_01HXYZ9876ABCDEF0000",
"firstName": "John",
"lastName": "Smith",
"email": "john.smith@example.com",
"status": "SUSPENDED",
"kycStatus": "APPROVED",
"kycVerifiedAt": "2026-05-01T09:05:00Z",
"suspendedAt": "2026-05-22T10:00:00Z",
"totalCards": 2,
"totalSpendCents": 125000,
"createdAt": "2026-05-01T09:00:00Z",
"updatedAt": "2026-05-22T10:00:00Z"
},
"meta": {
"requestId": "req_01HXY123456ABCDEF",
"platform": "Fyatu CaaS",
"timestamp": "2026-05-22T10:00:00Z"
}
}
Webhook
ACARDHOLDER_SUSPENDED event fires immediately after a successful suspension:
{
"event": "CARDHOLDER_SUSPENDED",
"eventId": "evt_01HXY123456ABCDEF",
"businessId": "BUS1A2B3C4D5E6F",
"environment": "LIVE",
"timestamp": "2026-05-22T10:00:00Z",
"data": {
"cardholderId": "chl_01HXYZ1234ABCDEF5678",
"status": "SUSPENDED",
"suspendedAt": "2026-05-22T10:00:00Z"
}
}
Error Codes
| Code | HTTP | Cause |
|---|---|---|
ALREADY_SUSPENDED | 409 | Cardholder is already suspended |
CARDHOLDER_TERMINATED | 409 | Terminated cardholder cannot be suspended |
CARDHOLDER_NOT_FOUND | 404 | Cardholder does not exist or belongs to another business |
VALIDATION_ERROR | 422 | reason exceeds 500 characters |
INSUFFICIENT_SCOPE | 403 | Key lacks cardholders:write scope |
Authorizations
API key from the FYATU CaaS portal. Pass as Authorization: Bearer <key>.
Path Parameters
Body
application/json
Example:
"Suspected fraudulent activity"
⌘I

