An Affidavit of Discovery Compliance is a sworn statement confirming that a party has fully cooperated with these obligations. The affiant states they have conducted a diligent search for all requested documents and have turned over everything relevant that is not privileged.
This prevents "trial by ambush," where a party hides evidence until the last minute. Signing this affidavit falsely by withholding evidence is a serious ethical violation and can lead to sanctions, fines, or even losing the case automatically.