An executor has significant legal responsibilities that begin immediately after someone’s death. First, they must locate and secure all estate assets, from bank accounts to real estate to personal property. This includes changing locks, notifying insurance companies, and ensuring nothing is lost or stolen. The executor must also file the will with Nassau County Surrogate’s Court, petition for letters testamentary, and provide notice to all beneficiaries and potential heirs. They’re responsible for paying valid debts, filing final tax returns, and maintaining detailed records of all transactions. Throughout the process, the executor must act in the estate’s best interests, avoid conflicts of interest, and keep beneficiaries informed. They can be held personally liable for mistakes or breaches of fiduciary duty, which is why many executors work with experienced probate attorneys to ensure they fulfill their obligations properly.