aaaaaaaaaaa [35] – n. communication via email, text, letter, or voicemail that arrives after the sender has died:
He did not know why his wife was aaaaaaa [12] until he saw the handwriting on the envelope and realized that she was holding a aaaaaaaaaaa [35] from her sister.
Apparently some of the thousands of messages that were received 6+ months after they were sent were from people who had died in the intervening months. This entry was the first thing I thought of.
https://www-nytimes-com.cdn.ampproject.org/v/s/www.nytimes.com/2019/11/08/style/text-message-valentines
Yes, the BBC also discussed this issue and I wish that I could interview one of the people who received a message from a dead loved one – https://www.bbc.com/news/technology-50345471