Thanks, Angie54, for sharing this issue! Unfortunately, I have no idea what to do in such a case, but a good Spanish solicitor should be able to throw light on this issue or maybe you can go to the local notary with the papers. We have found that notaries are very helpful and will answer questions of this sort.
We are in the process of buying a house and how I will even have to check out the neighbours, in case the neighbouring house is a reposessed bank property!!! So thanks again for sharing!