Thank you for your question. I am a different contributor and I look forward to working with you to provide you the information you are seeking for educational purposes only.
I understand that this was a conservatorship and you were conservator and the ward died. Once the ward died, this becomes a probate matter actually, because now the estate of the ward would be liable for the debts of the ward. If the estate is insolvent, then that is the end of it, you could throw more money into this and pay to place the estate into insolvency
or you simply submit your final accounting to the court in your conservatorship and anyone who is due money can sue the estate which has nothing and thus is insolvent and they would get nothing still from their suit.
Pursuant to CA probate Code 1860, (a) A conservatorship continues until terminated by the death of the conservatee or by order of the court.
Thus, upon your dad's death the conservatorship was terminated by operation of the law, it does not require a court order in that instance. Once he died, now a probate estate situation occurs. Again, if the estate is insolvent then there is nothing you can pay creditors from.
Pursuant to CA probate code 2110, Unless otherwise provided in the instrument or in this division, a guardian or conservator is not personally liable on an instrument, including but not limited to a note, mortgage, deed of trust, or other contract, properly entered into in the guardian's or conservator's fiduciary capacity in the course of the guardianship or conservatorship unless the guardian or conservator fails to reveal the guardian's or conservator's representative capacity or identify the guardianship or conservatorship estate in the instrument