DECLARACION DE RESIDENCIA FISCAL

Hi,

I have had a Declaracion DE Residencia Fiscal, not for me but my wife, its from Cajasol stating that i have to return this by 30th April, what is this for?  The problem is that its all in Spanish, despite scanning the form in i am still a little unsure what they are asking for, what is NIF.  I have posted the part below that i still do not understand, any help will be much appreciated and will benefit anyone else with cajasol also:

En......................a.....de................................................de........................................

NIF:.................................   (What is NIF?)

REPRESENTANTE:                                                                                                              Firma del contribuyente o su representante:

I don't know if this is the same form but the last time I was in Cajasol I was asked to sign a form confirming my UK address.

Hi    the capital repayment on my mortgage with Cajasol hadn't  been taken by the bank in April although the interest payment was.I managed to contact Cajasol and was told that the reason was that my decleration of fiscal residence had expired.

It is renewable every two years. Cajasol  e-mailed the relevant forms  to me for myself and my wife to sign and return. I presume

that NIF  is in fact  the NIE number.

                                                   JK    Pebble Beach