A state government has the legal right to claim the property of a person who has passed away and has no heirs or beneficiaries. Here's the problem: almost all state governments today are experiencing significant shortfalls in revenues. As a result, some states have become a little too eager and too aggressive about claiming property through escheatment.
What often happens is that an account holder has not stayed in contact with a brokerage or financial institute for a long time. The financial institute then reports the assets in an account as unclaimed property. Rather than making any effort to locate the person who owns the account, the government claims the property as its own. This can create issues for people who have long term investments as part of their retirement and estate plans.
Recently, Investopedia listed how you can avoid this happening to your stock accounts in "4 Ways to Avoid Escheatment of a Stock Account."