Overview Step 1 and 2: Obtain an HDB Flat Eligibility (HFE) Letter. ... Step 3: Search for a suitable flat and obtain an Option to Purchase (OTP) from flat seller. ... Step 4: Confirm mode of financing. ... Step 5: Submit Request for Value. ... Step 6: Convert In-Principle Approval (IPA) into a Letter of Offer (LO) More items...