What can I legally do regarding lost or stolen bonds?

Many more details are needed to effectively answer your question. Like do you know where the assets are located? Was there a probate? How were you made aware of this, etc. Try reposting your question with more details. This information is only intended to give general information in response to an inquiry. It does not establish an attorney client relationship. This response is only based upon the limited facts presented and is merely intended to assist you in determining if you should contact an attorney to provide you with legal advice.