Quite a non story, working in the medical field... Obviously it's a mistake and shouldn't have happened, but why would one be "shaking like a leaf" because a computer screen says you died 4 months ago? Like, do you think you're gonna drop dead because that's what the computer says? Or that you've actually been dead this whole time and you're just imagining it?
"Whoever did it, whoever pressed the button, shouldn't be working where they're working" 🙄 ok grandma let's get you home.
To explain a bit, institutions will likely freeze all your accounts (including your money) until the mistake is "officially" corrected. This means without family or a friend to help, you can easily get stuck.
It would be tricky as they can only release them with an official correction, which can take time.
One of the biggest reasons they would freeze them is for fraud prevention. If there is any activity on an account when a person is supposed to be dead, it would indicate something is awry and it's their duty to prevent it.
They are, that's why they freeze things first and only proceed when they get a copy of the death certificate. Someone has to give them the death certificate, which is why nothing happened here for 4 months.
For bank accounts, this means you can't withdraw their money until it's gone through probate. However, if it's a joint account then the surviving account holder can still use the account as normal. However if no one's pushing for probate (and without death certificates) nothing much will happen for a while.
This is why it's a bit of a non-story, nothing major happened ultimately, nothing was likely to happen soon (her carer's payments stopped temporarily but it sounds like she didn't realise until after the hospital appointment), and if anything the most surprising thing is that it took the "dead" person 4 months to even notice the mistake.