EIP3 and Deceased taxpayer

[cpabsd]

Client's mother in law passed away on 3/17/2021.  Today they received her stimulus check for $1400.  Does it need sent back or since she was alive when law was signed should it be deposited into the estate account?  

[Lion EA]

My limited understanding is if she was alive after 12/31/2020, as long as she didn't die before 01/01/2021, then she qualifies for EIP3.

[Slippery Pencil]

Why are so many people hellbent on sending these payments back?  No good can come of that.