When my wife died over four years ago, I had to deal with her various online accounts. The most egregious was an organization where we had a family membership. I called them and told them she died. They expressed condolences, and said they would switch me over to my own membership.

When renewal time came, I received two emails: one to me, and one redirected from my wife's email address. Mine said (names changed for reasons of privacy):

"Dear Herodotus, We hope this email finds you and your family well. It is time to renew your membership...."

The second one said this:

"Dear Jane (Deceased), We hope this email finds you and your family well....."

Not all experiences were this bad, but I did get the feeling that most people building client databases do not give much thought to the one use case that is guaranteed for every entry in the client database: Death.