You may apply for an HFE letter if you have obtained an Interim Judgment (for civil divorces)/ Decree of Divorce (for Muslim divorces) and settled the ancillary matters on your matrimonial property and the custody, care, and control of your children (if any). You must submit the Final Judgment (for civil divorces)/ Certificate of Divorce (for Muslim divorces) on or before the legal completion of your flat purchase (i.e. key collection for new flat or completion appointment for resale flat) and remain eligible for the flat purchase.

This information is sourced from HDB