South Dakota adopted the Uniform Probate Code, which means its will-signing rules are more flexible than in many other states - but "more flexible" still means there are rules. Miss the two-witness requirement on a typed will and a South Dakota probate court won't accept it, regardless of how clearly it expresses the testator's wishes.
This page covers what South Dakota law requires, how holographic wills work under the UPC framework, and what to watch for if you've used an AI tool to draft an estate planning document.
This is not legal advice. Estate planning involves details specific to your assets, family, and state law. Talk to a licensed attorney in South Dakota before signing or relying on any estate planning document.
What South Dakota Law Requires for a Valid Will
SDCL § 29A-2-502 (South Dakota's adoption of the Uniform Probate Code) sets out the requirements for a valid attested will:
- ·Age: The testator must be at least 18 years old.
- ·Capacity: The testator must be of sound mind - understanding the nature of making a will, what property they own, who their natural heirs are, and how the will distributes the estate.
- ·Writing: The will must be in writing.
- ·Signature: The testator must sign the will, or have another individual sign in the testator's name in the testator's conscious presence and at the testator's direction.
- ·Two witnesses: Two individuals must sign within a reasonable time after witnessing the testator sign the will (or witnessing the testator acknowledge their signature or acknowledge the will).
South Dakota's UPC framework gives witnesses slightly more flexibility than older common-law states: they must witness the signing or acknowledgment, but they do not have to sign in the testator's physical presence. However, the two-witness rule remains firm.
Witness Requirements in South Dakota
South Dakota follows the Uniform Probate Code approach to witnesses:
How many witnesses are required? Two. Both must sign within a reasonable time after witnessing the testator's execution or acknowledgment.
Do witnesses have to be in the room at the same time? Not necessarily. Each witness must have witnessed the testator sign or acknowledge the will. They can each sign separately as long as they do so within a reasonable time.
Can a beneficiary be a witness in South Dakota? Yes. Under the UPC model adopted by South Dakota, an interested witness does not automatically invalidate the will or their bequest. This is more permissive than some non-UPC states.
What makes a good witness? An adult who is not a beneficiary under the will, likely to be available during probate, and able to confirm the signing circumstances if asked.
Notarization in South Dakota: Not Required, But Useful
Notarization is not required for a will to be valid in South Dakota. The testator's signature plus two witnesses satisfies SDCL § 29A-2-502.
Notarization becomes relevant for a self-proving will. Under SDCL § 29A-2-504, the testator and witnesses can sign a self-proving affidavit before a notary. This affidavit allows the will to be admitted to probate without requiring the witnesses to appear in court or submit sworn statements.
The practical benefit: witnesses become unavailable over time - they move, die, or become difficult to locate. A self-proving affidavit eliminates this probate bottleneck at minimal cost.
Holographic Wills in South Dakota
South Dakota recognizes holographic wills under SDCL § 29A-2-502(b). Requirements:
- ·The material portions of the will must be in the testator's own handwriting (not necessarily the entire document)
- ·The testator must sign the document
- ·No witnesses are required for a valid holographic will
Note: South Dakota follows the modern UPC approach, which only requires the material portions to be handwritten - not the entire document. This is more permissive than states that require the will to be entirely in the testator's handwriting.
However, typed wills (including those generated by AI tools) that are not supplemented by handwritten material portions do not qualify as holographic and need the two-witness formality.
Common Mistakes That Void a Will in South Dakota
- ·Only one witness on a typed will. If the will is not holographic, a single witness fails SDCL § 29A-2-502.
- ·Witnesses who didn't actually witness the signing. Witnesses must have been present when the testator signed or acknowledged the will. Post-signing witness signatures are invalid.
- ·Signing without testamentary capacity. If the testator lacked capacity at signing - due to dementia, medication, or undue influence - the will can be contested successfully.
- ·Failure to update after major life events. Divorce, new children, or acquired property may not be covered if the will is never updated.
- ·Beneficiary designations that conflict with the will. Retirement accounts, life insurance, and payable-on-death bank accounts pass by beneficiary designation, not by will. Outdated designations can undermine a carefully drafted estate plan.
AI-Drafted Wills in South Dakota
AI tools generate will templates quickly, but they cannot verify South Dakota-specific compliance. Common gaps:
- ·Generic UPC language that may not reflect SD's specific adopted code sections or local probate procedure
- ·Missing personal property memorandum provisions - SD allows a separate personal property list to be incorporated by reference (SDCL § 29A-2-513), but many AI templates don't explain this option
- ·No digital asset provisions - South Dakota adopted the Revised Uniform Fiduciary Access to Digital Assets Act, but AI templates often omit it
- ·Insufficient specificity on executor powers and bond requirements
If you've drafted a will with ChatGPT or a similar tool, a review by a licensed SD attorney before signing is the practical step between "probably fine" and "confirmed valid." This is not legal advice - consult a licensed attorney in South Dakota for your situation.
Self-Proving Wills Under SDCL § 29A-2-504
South Dakota's self-proving affidavit procedure (SDCL § 29A-2-504) allows a will to be admitted to probate without requiring witnesses to appear in court. The process:
- After executing the will with two witnesses, the testator and witnesses appear before a notary
- All three sign the self-proving affidavit attesting that the proper execution formalities were followed
- The notary acknowledges the affidavit and attaches it to the will
Alternatively, South Dakota allows a will to be signed as self-proving at the time of original execution - combining the attestation and self-proving steps into one ceremony.
The self-proving affidavit does not change the will's content or validity. It simply creates a sworn record that eliminates the need for witness testimony during probate.