I had to give the bank back a month's social security payment because my mom died (in '05) before that payment was deposited. It took about ten days to get death certificates because it was just before Christmas.
The article in the link annoys me because they're getting away with it.http://www.moneytalksnews.com/2014/04/1 ... dium=email
Sorry, I don't feel bad about the "whole" thing just how they did.
Your mother's estate got extra "money" that didn't belong to it. It should have been repaid then. Instead, the extra money benefited the heirs. So the IRS finds out who the heirs are and takes it back from them.
It sure would be nice if the IRS wrote a letter to describe what happened or gave a way to allocate the payments between siblings. But the money was/is their money in the first place.