Can someone with a power of attorney legally change or sign a will, and if that happened, is the will invalid? – South Carolina

Short Answer

In South Carolina, a power of attorney does not give an agent the legal power to change another person’s will. A will or codicil must reflect the decedent’s own act, and it must meet South Carolina will-signing requirements. A person may sign the testator’s name only if the testator directs that person to do so and the signing happens in the testator’s presence. If a sibling with power of attorney signed, arranged, or influenced a will change, the will is not automatically invalid, but those facts can support a will contest based on improper execution, lack of capacity, undue influence, fraud, or breach of duty.

Understanding the Problem

The issue in South Carolina is whether a person acting under power of attorney can make or approve will changes for a decedent, and whether a disinherited heir can ask the Probate Court to review a will that appears to favor the power-of-attorney agent. The key decision point is whether the will was the decedent’s own valid act, signed with the required formalities and free from improper pressure.

Apply the Law

South Carolina treats a will as a personal act. A financial power of attorney can let an agent handle property and transactions during the principal’s life, but it does not let the agent rewrite the principal’s will. The main forum is the South Carolina Probate Court in the county where the decedent was domiciled at death. If the will has already been informally probated, a contest generally must be started within the later of eight months after informal probate or one year after death.

Key Requirements

Testator’s own will: The decedent must have been legally able to make a will and must have acted with a sound mind.
Proper signature: The decedent must sign the will, or another person must sign the decedent’s name in the decedent’s presence and at the decedent’s direction. A power of attorney alone does not supply that direction.
Two witnesses: At least two people must sign as witnesses after seeing the signing or hearing the decedent acknowledge the signature or the will.
No improper pressure: A will can be challenged if the result came from undue influence, fraud, or coercion rather than the decedent’s free choice.
Timely probate challenge: An interested person must use the formal testacy process to ask the Probate Court to set aside or prevent probate of the disputed will.

What the Statutes Say

S.C. Code Ann. § 62-2-501 (Who may make a will) – A person who is not a minor and is of sound mind may make a will.
S.C. Code Ann. § 62-2-502 (Execution of wills) – A South Carolina will must be in writing, properly signed, and witnessed by at least two people.
S.C. Code Ann. § 62-2-503 (Self-proving wills) – A will may include a self-proving affidavit, which can make proof of signing easier but does not block a valid contest.
S.C. Code Ann. § 62-2-504 (Interested witnesses) – A beneficiary can serve as a witness, but a gift to that witness, the witness’s spouse, or the witness’s issue may be limited if there are not two disinterested witnesses in addition to the interested witness.
S.C. Code Ann. § 62-8-201 (Power of attorney authority requiring specific grant) – Some property-related acts require express authority, but this statute does not make will changes an agent’s act.
S.C. Code Ann. § 62-8-114 (Agent’s duties) – A power-of-attorney agent must act within the granted authority, in good faith, and for the principal’s benefit.
S.C. Code Ann. § 62-3-401 (Formal testacy proceedings) – A formal testacy proceeding is the Probate Court litigation used to decide whether a decedent left a valid will.
S.C. Code Ann. § 62-3-108 (Probate and contest time limits) – A contest of an informally probated will must be brought within the later of eight months from informal probate or one year from death, with a ten-year outer limit for starting probate or testacy proceedings in most cases.

Analysis

Apply the Rule to the Facts: A will that disinherits a child or other heir in favor of a sibling is not invalid just because the sibling held power of attorney. The key question is whether the decedent personally made the will decision, had capacity, and signed or directed the signature in the required way. If the sibling signed the will using only the power of attorney, arranged changes that the decedent did not direct, isolated the decedent, or pressured the decedent, those facts may support a formal will contest. For more detail on pressure-based challenges, see how to prove undue influence and contest a will in South Carolina.

A person with power of attorney may help with transportation, scheduling, or communication, but that assistance can become evidence in a contest if it shows control over the decedent’s choices. South Carolina courts look at the signing circumstances, the decedent’s condition, the agent’s role, the witnesses, prior estate plans, and whether the new will makes an unnatural or unexplained change. A self-proving will may shift the initial proof burden on execution, but it can still be challenged with evidence that the signing requirements, capacity, or free-will requirements were not met.

Process & Timing

Who files: An interested person, such as an heir who would inherit if the disputed will fails. Where: The South Carolina Probate Court in the county where the decedent was domiciled. What: A summons and petition for formal testacy, often asking the court to set aside informal probate, prevent informal probate, determine heirs, or require production of relevant probate documents. When: If informal probate already occurred, file by the later of eight months after informal probate or one year after death.
Get the probate file: Once a probate case has been opened, the filed will and probate filings can usually be requested from the county Probate Court. The court file can show who applied, which will was filed, whether a personal representative was appointed, and whether notices were sent.
Preserve evidence: Gather earlier wills, communications about estate planning, medical records tied to capacity, witness information, caregiver notes, and records showing the power-of-attorney agent’s involvement. If the agent handled financial matters, the personal representative or a successor in interest may request records of the agent’s transactions under South Carolina power-of-attorney law.
Serve interested persons: In a formal testacy case, required parties include heirs, devisees, named personal representatives, and others identified by the Probate Code. The Probate Court then sets the matter for hearing and decides whether the will is valid.
Final outcome: The Probate Court may admit the will, reject it, limit a gift affected by an interested-witness issue, recognize another valid will, or determine that the estate passes under intestacy rules if no valid will controls.

Exceptions & Pitfalls

Proxy signing is different from power-of-attorney signing: South Carolina allows another person to sign the testator’s name only when the testator directs it and the signing occurs in the testator’s presence. That is not the same as an agent independently signing under a power of attorney.
A codicil needs will formalities: A change to a will usually must be executed with the same care as a will. Informal edits, handwritten margin notes, or unsigned drafts can create disputes and may not change the estate plan.
Interested witness issues may limit a gift rather than void the whole will: If a witness, the witness’s spouse, or the witness’s issue receives a gift under the will, South Carolina law may reduce or void that person’s excess gift unless there are two disinterested witnesses in addition to the interested witness.
Undue influence requires evidence: Suspicion alone usually is not enough. Stronger evidence may include isolation, dependence, sudden disinheritance, the agent’s control over appointments or documents, inconsistent statements by the decedent, and a plan that conflicts with long-standing wishes. For related proof issues, see evidence that helps prove undue influence or lack of capacity in a South Carolina will signing.
Waiting can harm the case: Probate deadlines can run before all records have been gathered. A formal petition can preserve rights while the investigation continues through court-supervised discovery and document requests.
Power-of-attorney records can matter: An agent’s financial records may show dependence, gifts, beneficiary changes, or control over access to the decedent. Those records do not decide the will contest by themselves, but they can support the larger picture.

Conclusion

In South Carolina, a power of attorney does not let someone change or sign another person’s will as the agent’s own act. The will stands or falls on the decedent’s capacity, proper signing, required witnesses, and freedom from undue influence or fraud. If a disputed will was informally probated, the action-oriented next step is to file a formal testacy petition with the county Probate Court by the later of eight months after informal probate or one year after death.

Talk to a Probate Attorney

If a power-of-attorney agent may have arranged, influenced, or signed will changes that disinherit an heir, our firm has experienced attorneys who can help review the probate file, evaluate contest deadlines, and explain the evidence needed to protect the client’s rights.

Disclaimer: This article provides general information about South Carolina law based on the single question stated above. It is not legal advice for your specific situation and does not create an attorney-client relationship. Laws, procedures, and local practice can change and may vary by county. If you have a deadline, act promptly and speak with a licensed South Carolina attorney.