Key facts: Contest petitions must be filed within 30 days of will admission to probate under NDCC § 30.1-17-17; contestants must prove grounds by clear and convincing evidence; standing requires being an interested party who would benefit from intestate succession or a different will interpretation; small estate procedures under NDCC § 30.1-23 do not eliminate contest rights for estates under $50,000; two witnesses are required for valid will execution under NDCC § 30.1-04-03.