Arraigo - Certificado de Empadronamiento
Good Afternoon,
Even if the certificado de empadronamiento ( or town hall registration certificate) is a very important document to credit your continuous stay in Spain, it is not a basic requirement. If you have other documents to credit your stay in Spain for the last 3 years and are able to provide with the rest of the documentation required for the residency by settlement application, the empadronamiento will be one more document to credit your current status.
Regards,