https://www.democraticunderground.com/?com=post&forum=1014&pid=2482878

The same thing happened to someone I know whose husband died 13 months ago. She got $2,400. I told her not to spend it. She said she won't but also will not voluntarily send it back. She hates tRump and she isn't making it easy for them.

https://money.yahoo.com/coronavirus-stimulus-checks-payments-to-dead-relatives-should-be-returned-mnuchin-says-152837927.html

I think it may take more time to “process” a tax return than we think. Even though a tax refund is issued the IRS may still need more time to complete processing the return. I once had to know when a tax was “assessed” by the IRS to determine if I could still amend it to get a refund. The “date of assessment” was about six weeks after I filed the return.

It’s far worse than when you are the one who skips out on sending them money.

My tax lady told me not to send it back and to just put it away and wait till they want it back because it’s much less of a hassle. Eventually they wrote a letter demanding to have it returned. I returned it thinking that was the end. Nope. They wrote me again telling me to pay them. It took months to straighten out their stupid mistake.