It is simply a list of all the important information that you need to know to run your family life. In some households one person does all the finances, while the other handles the medical stuff. If one person dies or becomes incapacitated, the other, on top of all the shock and grief, would have to figure out when to pay the credit card, or how to claim the insurance. An Emergency Register is a How To guide for your partner.
Of course you could just get a piece of paper and jot down everything you know that's important. But to save you some brain work we have created a questionnaire which will lead you through all the important areas you may need to consider. It's FREE so why not use it?