American estate law grew out of two very different legal traditions, and the line between them still runs through the country today. Nine states, most of them in the West and Southwest, inherited a community-property system shaped by Spanish and French civil law, under which most property acquired during a marriage belongs equally to both spouses no matter whose name sits on the title. The remaining states, Pennsylvania among them, follow English common law, where ownership is tracked asset by asset and a will, or the absence of one, does the work of sorting out who receives what when someone dies. A plan built correctly under one system can produce an odd, even unintended, result under the other. That mismatch is one reason a move across a state line is rarely as simple as updating a mailing address on file with the bank. Families rarely think about which legal tradition governs their paperwork until something forces the question, usually a job relocation, a retirement move, or the death of a relative whose documents suddenly need to hold up under a different state’s scrutiny.
Two Legal Traditions, One Country
In a community-property state, a spouse generally cannot give away more than half of what the couple owns together, because the other half already belongs, by law, to the surviving spouse regardless of what any document says. A will written with that assumption baked in can misfire completely once the couple relocates to a common-law state, where property is presumed to belong to whoever holds title unless a deed, account statement, or other paper trail says otherwise. Married couples who move sometimes discover, often at the worst possible moment, that assets they always treated as jointly owned are, on paper, titled to only one of them, which changes who actually has the legal authority to leave that asset to someone else. Retirement accounts and life insurance complicate the picture further, since federal rules on those products can interact differently with state marital-property law depending on where the couple lived when a policy was purchased or an account was first opened. Very little of this shows up in the plain language of a will, which is exactly why the underlying property system matters as much as the document itself, and why the same set of intentions can produce two different outcomes depending on the state line. Even something as ordinary as a jointly held bank account can carry different legal meaning depending on which side of that divide a family happens to live on, and few people think to ask the question until a dispute forces it into the open.
Formalities That Don’t Cross State Lines
Even once assets are correctly identified, the mechanics of transferring them differ from one state to the next. Some states require formal, court-supervised probate for nearly every estate, while others allow a simplified or informal process once the estate falls under a certain size or the assets are structured in a particular way. The number of witnesses required to sign a will, whether a notarized self-proving affidavit is standard local practice, and how strictly a court reads a document that departs even slightly from local execution rules all vary by jurisdiction. A will properly signed in one state is generally still recognized in another under longstanding legal principle, but recognized is not the same as convenient. An executor unfamiliar with local procedure can lose real time simply learning how a particular county courthouse operates, which is one reason regional practices such as Leeson & Co. in Pennsylvania’s Lehigh Valley build their planning work around the quirks of their own state’s rules rather than a generic, one-size-fits-all national template. That local fluency, multiplied across dozens of different court systems and filing conventions nationwide, is part of why a document that looks perfectly fine on paper can still create friction the moment a family actually needs to use it.
The Tax Question Most People Get Wrong
Federal estate tax now touches only a small fraction of American households, and many people reasonably assume that means their estate owes nothing to anyone when they die. That assumption breaks down at the state level. A handful of states impose their own estate tax, calculated separately from the federal one and often with a far lower exemption threshold, meaning an estate that owes nothing federally can still trigger a state bill. A smaller number of states impose an inheritance tax instead, levied not on the estate itself but on the individual people who receive property from it, frequently at rates that depend on how closely the heir was related to the person who died. A family that assumes no tax applies simply because the federal exemption is so generous can be caught off guard by a state-level bill that has nothing to do with the federal system at all. Because these rules generally attach to where the deceased person lived, and sometimes to where real property physically sits, a household that relocates is not merely changing scenery. It is potentially changing which tax regime applies to everything left behind, which is precisely the kind of shift a periodic document review exists to catch before it becomes someone else’s unexpected problem to sort out after a death. None of these differences make one state’s approach better or worse than another’s, only different, and a plan written with genuine care in the state where it was signed deserves the same care applied again whenever the underlying facts change.
