Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
What was the payment for.
Did you put notices regarding claims on the estate in the paper?
But was there an advert asking for Creditors to come forward
Have they explained how the overpayment happened?
No evidence at all?
Then your starting point is to write back and ask for a detailed breakdown of the debt and an explanation for the delay in notifying you.
Tell them that the monies have already been distributed and no further action can be taken until you have received that information
If they can justify it then you and your sibling will have to make proposals for payment by instalments - since I am SURE the capital has already been spent
Please ask if you need further details