I don't understand why your father would have to go on the deeds either. Can you push the issue directly with PTSB perhaps again? The only option I can think of is for your father to execute a deed of trust indicating that he only went on the deeds/mortgage as otherwise you would not be given the mortgage, but that he has never contributed to the mortgage, nor does he intend to, and then you keep evidence of all mortgage repayments coming from your own account, and in time, if anything happens to your dad, whip out the deed of trust and show to revenue and also show that all mortgage repayments were made solely by you. In time once either your own income rises, or the outstanding balance is low enough for you to qualify for the mortgage in your own right you could re-mortgage and if your dad is still alive, ask him to execute a transfer into your sole name, if dead, his per rep can do it using the deed of trust to avoid stamp duty/ CAT problems. However the flaw with this is the terms and conditions of the loan offer which evidently will state the property is to be in the names of yourself and your dad and your solicitors undertaking to the bank on the title will be to do this and perhaps the deed of trust may fall foul of this. You could explore this option with your solicitor in any case. I do think though that PTSB should not insist on this and that your first step should be again to approach them.