I did not see a state mentioned, but I know in mine (and many others) there is nothing you have to do until your separated for a period of time (usually a 6 month to a year). You can do ED (Equitable Distribution or Equal distribution depending on the state), and resolve alimony either through a separation agreement or file court claims after a separation happens. In many states one party moving out without the consent of the other is "abandonment", and at-fault divorce cause. On the joint accounts, if your spouse moves out it looks better if split the money and close the account, or leave it untouched. Be as financially responsible as possible.
