When you sign up for your vouchers, a One Time Password (OTP) will be sent to the mobile number you have keyed in for verification, to ensure vouchers will not be sent to the wrong mobile number.

If you had keyed in the wrong mobile number, you will not receive the One Time Password and you can return to the previous page to key in your mobile number again.  

One Time Password will be sent to your registered mobile number.

Vouchers will be sent to your verified mobile number from gov.sg