In South African family law, the duty of uberrimae fidei (utmost good faith) is non‑negotiable. The recent case of SJJ v MMJ [2026] ZAGPJHC 57 shows how a poorly prepared Rule 43 interim maintenance application can collapse — even when the need for support is clear. The plaintiff’s Financial Disclosure Form (FDF) was riddled with omissions and selective reporting. The High Court dismissed the application with costs, leaving her without interim relief and damaging her credibility for trial.