REGISTERING ON THE PADRÓN
With reference to whether it is compulsory to be on the Padron, here is the UK Gov advice:
If you live in Spain you must register on the padrón municipal, which is a list of all the people who live in a certain town.
You must register at the address where you normally live. You cannot be registered on the padrón (“empadronado”) at more than one address.
You do not need to own a property to register, you can still register if you are renting or live with others.Registering on the ‘padrón municipal’ where you live is not the same as registering as a resident in Spain, which is a separate national register called the ‘Registro Central de Extranjeros’.
To make an appointment you have to call to the Town Hall Telephone: 968 59 00 12