The settlor of an intervivos trust named herself as trustee and three other persons as successor trustees. One of those successor trustees was the settlor's son. Several years later, the settlor executed a general power of attorney (GPOA) in which she directed that the son was to be the executor of her estate and trust. The settlor, as principal, and the son, as agent, signed the GPOA. The legal question was whether the GPOA was sufficient to amend the trust. The court held that it was because, in accordance with the trust language, the settlor reserved the right to amend the trust "by a duly executed written instrument...". Strange v. Towns, 330 Ga. App. 876 (2015).