With the Certificado de Defunción or legalised Death Certificate arranged then the next step is to request the Certificado de Registro General de Actos de Última Voluntad (RGAUV). The RGAUV certificate is issued by the central office for wills and testaments in Madrid and verifies the existence or otherwise of a Spanish will.
It will be necessary to wait for a period of 15 days from the date when death occurred before ordering the certificate. If ordering the certificate then there is an administrative charge that requires completing form 790. It will be necessary to send an original (not a copy) of the death certificate and it normally takes around 10 days to receive the certificate.
It may also be convenient at this stage to acquire any Life Insurance Contract that may exist. If the life insurance contract was taken out in Spain then it will be registered in the same place as the RGAUV certificate.
If however, as is more likely, the life insurance was taken out in a country of origin such as the UK or Ireland then the insurance company will have their own process.
This will typically involve sending an original (not a copy) of the death certificate and completing whatever form the insurance company uses.