We have a safe. Two non-resident family members have the code. In the safe, hard copy wills and deeds, but also a print out of an excel sheet with a list of all account details and passwords on it. The list is re-printed one or two times a year. First entry is a pointer to the Excel file and the file password. The file is updated at least annually as part of tax returns.

Account details include banks, investment a/cs, computer passwords, lastpass, phone passcodes, credit cards, insurance, vehicle records, high value assets. Most of this stuff is quite static so it's long winded to set it up initially but very low maintenance.

Can't recommend highly enough doing something like this if you have dependent family or any vaguely complex list of possessions.