Key facts: Ga. Code § 53-11-1 governs will contests in Georgia; contestants must demonstrate pecuniary interest and standing; valid grounds include lack of testamentary capacity, undue influence, fraud, duress, and procedural defects; the $15,000 threshold affects probate procedure classification; contestants must file within statutory timeframes following probate admission; Georgia requires clear and convincing evidence to invalidate a will; appeals from probate court decisions proceed to superior court.