In a judgment, delivered earlier this week to a packed courtroom, Justice John MacMenamin was stinging in his criticism of Joe and Lala Dowse.
The judge found that although Joe Dowse, received permission from the Jakarta courts to give Tristan to another couple and told the Irish adoption Board he had done so - he actually placed the child in an orphanage.
Dowse who grew up in Carnew, Co Wicklow, will now have pick up the EUR 100,000 bill to pay for Tristan's upbringing until he is 18.
Mr and Mrs Dowse
, who are believed to be still living in Azerbaijan, were not in court but their solicitor said they were satisfied with the decision.
Joe and Lala Dowse adopted the Indonesian child at two months old - only to dump him in an orphanage two years later.
Dowse, an accountant from Co Wicklow, left his adopted son in an Indonesian orphanage three years ago, claiming the adoption was "not working out".
Aged two months, he was illegally adopted by Dowse and Azerbaijan-born wife Lala.
Two years later when Lala became pregnant, Joe Dowse left the infant at the orphanage and they moved to Azerbaijan.
Indonesian police believe Joe and Lala Dowse paid EUR400 to buy baby Tristan from rogue dealers in Jakarta in 2001.
But after two years the couple dumped the boy in a Jakarta orphanage after Mrs Dowse became pregnant with a child of her own.
Dowse also made strict demands on Tristan's birth mother's diet while pregnant as part of the deal.
Dowse ordered Tristan's mum, known only as Suryani, to adhere to a specific diet and forbade her from breast feeding her new-born son, in case she bonded with him and refused to hand him over as agreed.
Kieran Gildea of the Irish Adoption Board confirmed that a solicitor for the Dowse
family has met with the organisation in a bid to resolve the boy's status.
When I asked the toddler about the Dowses the still traumatised young boy frowned and walked away.
But the procedures the Dowses went through have left the Indonesian authorities angry.