Key facts: Mississippi requires will contests to be filed within 30 days of probate admission; contestants must demonstrate standing as interested parties; valid grounds include lack of testamentary capacity, undue influence, fraud, improper execution, or revocation; the burden of proof rests on the contesting party and requires clear and convincing evidence; Mississippi Statutory Probate Rules Code governs all procedural requirements; estates over $50,000 may follow different administration procedures but contest rights apply regardless of estate value.