In order to reduce the risk of fraud, some stores use a range of security mechanisms provided by MasterPass. Verifying your identity with a one time password during a transaction is one of the extra security steps MasterPass implements to ensure transaction security. This verification code is sent via SMS to the mobile number registered with your card issuer, and can only be used by you on one occasion. The MasterPass one time password procedure is details below:·        If you enter a verification code incorrectly 3 times in a row, the “No one time password entry attempts remaining“ warning will be shown. This warning means you cannot complete your transaction and you will have to start again.·        A one time password must be used within 3 minutes of it being sent. After 3 minutes the “One time password expired” warning will be shown. This warning means you cannot complete your transaction and you will have to start again.·        After the store website/mobile app verification screen is shown, within the next 15 minutes you can click "Send password again" to request a one time password. You can request a new OTP up to 3 times for a transaction. On the 4th request, the “One time password limit exceeded. Please try again in 3 minutes.” warning will be shown.