A9 WHAT HAPPENS IF I EXERCISE MY OTP BEFORE ACCEPTING MY BANK LOAN.

You need to call HDB officer and inform them you have mistakenly signed the OTP before you accept the bank letter of offer otherwise you cannot do the resale submission.

The officer will advise you what to do.

Rightfully you are supposed to have a valid HLE (by signing your bank loan FIRST, before exercising the OTP)