You can execute a Last Will and Testament in any state, and it can be used for probate purposes in any other state where proceedings may be required. A Last Will and Testament will be considered valid, as long as its execution complies with the requirements of the state in which it was executed. Luckily, almost all states have the same requirements for the execution of a Last Will and Testament. If you do move states, it is recommended that you consult with an estate planning attorney in order to update your estate planning documents.