If the loan was solely in your wife's name, the the amount is recoverable from her estate (is she left anything). If it was in both names it will be join and several. If you are suggesting you know it was solely your wife's loan and you never signed agreeing to it ( that she might have done so without your knowledge, or that for some reason the loan is in some way corrupt for other reasons) it's not recoverable from you. If the CCJ is in your wife's name alone tell them that and tell them you never signed anything and see where it goes form there, if that is the case.