Who can make a will? A person of sound mind and memory who is at least 18 years old.[1] Signing Requirements The signing must be in the presence of two or more credible witnesses.[2] Any generally competent person, including interested parties, may serve as a witness.[3] State Definition For the purpose of wills, intestate succession, and for all other purposes under Title 12, the definitions in this section shall apply.[4] Sample Download: PDF, MS Word, ODT Video Sources DE Title 12, Chapter 2 § 201 DE Title 12, Chapter 2 § 202(a)(2) DE Title 12, Chapter 2 § 203 DE Title 12, Chapter 1 § 101