The simplest way for beneficiaries to ensure the trustee is not abusing their authority or mishandling trust assets is to review trust accountings. An estate closing letter to beneficiaries is a crucial document in the process of settling an estate after someone has passed away.Probate accounting is also known as trust accounting. Can a California trustee require a beneficiary to sign a release in order to get a distribution from a trust? I need a sample letter to request a formal accounting of an estate and of a trust that I am very confident the trustee. Lindsey Munyer, Partner at Keystone Law Group, discusses the rights of trust beneficiaries and the steps they can take to enforce them. A sample Summary of Account form is included in this website. In some cases, the Probate Court may oversee the division of property of someone who has died ("the decedent"). This property is called a decedent's estate. Sample letter to trustee requesting accounting. California.