No, the daughter can't keep you out as your father's personal representative: you may need to go to court, however, to get a court order requiring her to let you in, in order to have the assistance of law enforcement (e.g. municipal police or county sheriff) to legally enter when she has physically locked you out. You probably want to bring the legal action to do so on an "emergent" (think: "urgent" or "emergency") basis so as to get into court in a week or two, not in months, and to do that, you most likely want a lawyer's assistance--filing an emergent basis is substantially more complex, procedurally, than, say, bringing a small claims action.While in court, you could also seek an order requiring her to return any property you can identify as having been your father's, and/or to at least provide a full list of everything taken and its disposition, so you can later follow up legally (e.g by suing her for theft) if necessary.