Posted: Fri Jun 29, 2018 7:17am
The registration on the padron should be renewed every five years though this can vary from area to area. An Ayuntamiento may send out a notice to all its registered citizens telling them to come and renew their registration if they are trying to increase the number of folk on their list to get more subsidy from government for schools, police health centres etc.
The certificate, that you need to show for instance to buy a car, or register as a foreigner is valid for three months, so you only need a new certificate if you are doing something like that.