Thanks everyone for replying, especially Maria de Castro
I managed to obtain a copy of the purchase contract and it makes no provision for further payment over and above the 3000 euros already paid.
it says that
' The outstanding amount, eighty two thousand euros (82,0000 euros) will be payable against the official title deeds before the notary public, on or before next (date here)"
the 82,0000 being the balance of the purchase less 3000 euros.
So, it seems to me that there is no legal obligation to pay the extra?
My friend doesnt want to lose the property and if he needs to pay it (to reduce the total amount payable on completion) then he will do but it doesnt seem right to me.
With regards to the deposit should the sale fall through. the contract states;
".....should the buying party breach the present contract and renounce to this purchase, the buying party shall hereby lose the amount/s granted up to the breach of contract"
any further thoughts?