Wills are generally not recordable documents until after death. They can also be changed. They have also been known to disappear.

You can draw up a pre-nup, record it, then if the original disappears, the recorded copy is as good as.

I've had quite good luck with them.

However, this differs from state to state.

One advantage to them is that both parties have a clear understanding of their financial situation and what the other expects.

I've seen some nasty situations, right at the graveyard.

I've also seen surviving SO with no marriage certificate kicked out of a home.

They aren't romantic, but they are binding. There are other ways to do it though.