A Massachusetts Petition for Allowance of Account is a formal document used in the probate court system of the Commonwealth of Massachusetts to request permission from the court to file an estate's account. The petitioner is typically the executor or administrator of the estate who is responsible for managing the deceased person's assets and liabilities. The petition must provide a detailed accounting of all transactions of the estate, including receipts, disbursements, and assets. It must also include a final statement of all assets and liabilities of the estate. The main types of Massachusetts Petition for Allowance of Account are: 1. Petition for Allowance of Final Account: This petition is used to file the final account of the estate which includes all assets and liabilities. 2. Petition for Allowance of Interim Account: This petition is used to file an interim account of the estate when additional transactions are expected to occur after the initial filing. 3. Petition for Allowance of Supplemental Account: This petition is used to supplement a previously filed account of the estate to include additional transactions or changes in assets or liabilities.