Do I have to be in Spain to complete the transaction?
If it is not possible for you to be present to complete the transaction, there are two methods, which will allow your lawyer to sign on your behalf:
Granting a Power of Attorney (Poder). This formally allows another person (either your lawyer or somebody else that you trust) to sign on your behalf. You can have this document prepared while you are in Spain by making an appointment with the Notary who will oversee all the formalities. Alternatively, a power of attorney can be prepared by a Notary Public in your home country. This power of attorney will have to be legalised for use in Spain by having an Apostille certificate attached to it under the terms of the Hague Convention.
Granting an informal verbal mandate to your lawyer (Applicable only if you do not require a mortgage). It is important to remember that if you choose this option you must ratify the contract as soon as possible after completion. This can be done by appearing before a Notary, either in Spain or your home country. If ratification takes place in your home country, however, it will be necessary to obtain an Apostille certificate before it is legally recognised in Spain. Ratification is simply a matter of confirming the purchase and providing a sample signature, which will be kept on file at the Property Registry.