diff --git a/ts/bunq.classes.account.ts b/ts/bunq.classes.account.ts
index a52bb74..38889aa 100644
--- a/ts/bunq.classes.account.ts
+++ b/ts/bunq.classes.account.ts
@@ -11,6 +11,7 @@ export interface IBunqConstructorOptions {
   environment: 'SANDBOX' | 'PRODUCTION';
   permittedIps?: string[];
   isOAuthToken?: boolean; // Set to true when using OAuth access token instead of API key
+  dangerousOperations?: boolean; // Set to true to enable dangerous operations like closing accounts
 }
 
 /**
diff --git a/ts/bunq.classes.card.ts b/ts/bunq.classes.card.ts
index 3d57fe5..85774e7 100644
--- a/ts/bunq.classes.card.ts
+++ b/ts/bunq.classes.card.ts
@@ -97,6 +97,12 @@ export class BunqCard {
    * Update card settings
    */
   public async update(updates: any): Promise<void> {
+    // Check if this is a dangerous operation
+    if ((updates.status === 'CANCELLED' || updates.status === 'BLOCKED') && 
+        !this.bunqAccount.options.dangerousOperations) {
+      throw new Error('Dangerous operations are not enabled. Initialize the BunqAccount with dangerousOperations: true to allow cancelling or blocking cards.');
+    }
+    
     await this.bunqAccount.apiContext.ensureValidSession();
     
     const cardType = this.type === 'MASTERCARD' ? 'CardCredit' : 'CardDebit';
diff --git a/ts/bunq.classes.monetaryaccount.ts b/ts/bunq.classes.monetaryaccount.ts
index c72b585..952818b 100644
--- a/ts/bunq.classes.monetaryaccount.ts
+++ b/ts/bunq.classes.monetaryaccount.ts
@@ -170,6 +170,11 @@ export class BunqMonetaryAccount {
    * Update account settings
    */
   public async update(updates: any): Promise<void> {
+    // Check if this is a dangerous operation
+    if (updates.status === 'CANCELLED' && !this.bunqAccountRef.options.dangerousOperations) {
+      throw new Error('Dangerous operations are not enabled. Initialize the BunqAccount with dangerousOperations: true to allow cancelling accounts.');
+    }
+    
     await this.bunqAccountRef.apiContext.ensureValidSession();
     
     const endpoint = `/v1/user/${this.bunqAccountRef.userId}/monetary-account/${this.id}`;
@@ -235,6 +240,10 @@ export class BunqMonetaryAccount {
    * Close this monetary account
    */
   public async close(reason: string): Promise<void> {
+    if (!this.bunqAccountRef.options.dangerousOperations) {
+      throw new Error('Dangerous operations are not enabled. Initialize the BunqAccount with dangerousOperations: true to allow closing accounts.');
+    }
+    
     await this.update({
       status: 'CANCELLED',
       sub_status: 'REDEMPTION_VOLUNTARY',