[lyrrad]

> Put your money in a broad index fund and don't look at it for 10 years.

You should check on their investments accounts on a regular basis.

If your bank or brokerage makes an error, there is likely a limited period of time during which it can be fixed.

Also, if you do not have activity on your bank or investment accounts for a period of time, the contents may be escheated by a state and investments may be sold automatically.

Planet Money had an episode about escheatment a couple of years ago: https://www.npr.org/transcripts/799345159 They mention that Delaware, where the person's broker was incorporated escheats investments after three years.