A furious father has said Kent's social services are a 'total shambles' after a letter intended for him was instead sent to his son, who is in foster care.
The 10-year-old boy read the letter, which detailed his care plan from social services and information about his schooling and foster placements.
His angry dad has said that seeing the letter has had a disastrous effect on his young son.
"It has affected his behaviour to a point where his school life is breaking down," the unnamed man told the BBC.
Kent County Council said it sincerely apologised for the error, but the dad says it is too late for apologies and that the damage has already been done, adding that the boy's school were now looking at expelling him.
"This mistake should never have happened," the single-father said, "It doesn't matter whether Kent County Council apologise to me or to the foster carer, it is too late. The damage has already been done. Social services is a total shambles."
Jenny Whittle, Kent County Council's cabinet member for children's services, said inquires were being made to find out how the mistake happened.
"We have been working closely with the family for some time and sincerely apologise for sending the letter in error," she said, "We are looking into how this happened to make sure it does not happen again."
"Our priority remains the welfare of the children and we will continue to work with (the father) to support him and his family."