by Gulliver » Fri Aug 05, 2011 8:25 am
What you are 'supposed to do' is inform the office that originally issued you with your NIE and Residencia of your change of address, and also inform your Ayuntamiento of the same.
As others have suggested, they probably won't do anything about it - especially as you are moving within the same town - but it might be a good idea to do the latter by e mail so you can prove that you have fulfilled your obligations in you should encounter a problem further down the line, which I doubt you would anyway.