Hello and welcome to JustAnswer. Please note: This is general information for educational purposes only and is not legal advice. No specific course of action is proposed herein, and no attorney-client relationship or privilege is formed by speaking to an expert on this site. By continuing, you confirm that you understand and agree to these terms.
I am very sorry to hear about your loss. You have a right to request a copy of the death certificate even if you are not family. You can get this document if you are: The spouse, parent, child or sibling of the deceased, OR, Other persons who have a: documented lawful right or claim, documented medical need, or New York State Court Order.
Someone in your situation fall under "documented lawful right or claim."
You can order a copy from the NY Dept of Public Health by mail, internet, or telephone - see HERE.
Can who take legal action against you? The daughter? I do not see how. Life insurance policy is OUTSIDE of probate, so his surviving family does not have a claim to it even if they were not included.
I hope this helps and clarifies. Please use the SEND or REPLY button to keep chatting, or please RATE when finished. You may always ask follow ups at no charge after rating. Kindly rate my answer as one of TOP THREE FACES/STARS and then SUBMIT, as this is how experts get credit for our time. Rating my answer the bottom two faces/stars (or failing to submit the rating) does not give me credit and reflects poorly on me, even if my answer is correct. I work very hard to formulate an informative and honest answer for you; please reciprocate my good faith with a positive rating.