A few years back, we had the administrator for the unclaimed property (for MD) to give a discussion about escheatment, etc. Yes, this was news to a lot of people. Where the owner of the property/funds resides is the controlling law.
If you go across state lines (or even if you don't), be aware that states may go for years without being aggressive about escheatment, then suddenly it may become a “hot” issue for that state (and you’re caught in the crosshairs).
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Comments are mine and not those of my employer.