A few years ago, one rainy morning, my DH & I made a word doc "in case of emergency" which we sent to our 2 ACs by email.
It prompted us to check that the deeds of our house were still safely lodged with our solicitors who had recently merged with another law practice.
Shockingly, we found that they didn't have the deeds because they had been retained by our old Building Society who mistakenly thought that
we still owed them £280,000 after the sale of our last house!
.
It took several (worrying) months to sort this Huge Error out but imagine if we'd both 'fallen off our perches' together and our ACs had genuinely thought that we did still owe the money!
In the email we stated in plain English what our financial situation was, life insurance policies, any outstanding loans and code to our home safe.
I recommend that everyone does this (if they trust their nearest and dearest).