Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello! I can help clear up what is happening.
Microsoft's billing security system has temporarily blocked your card after the initial failure to prevent fraud, which is why it now rejects your details without sending an OTP.
To resolve this issue, please follow these short steps:
• Wait 24–48 Hours: Stop trying to add the card immediately. Repeated attempts reset the security timer and keep the card blocked.
• Call Your Bank: The initial OTP failure usually means your bank flagged the Microsoft charge as suspicious. Ask them to whitelist Microsoft billing.
• Match Billing Details: When you try again, ensure the billing name and address entered on your Microsoft account exactly match your bank statement.
• Switch the Card Safely: Once the block lifts, add the new card at microsoft.com. Then, go to your Services & subscriptions tab, change the payment method for the Family plan to your new card, and safely delete the old ones.