Royal Decree 967/2014, of 21 November stipulates this procedure in clause 5 to substitute the recognition of the title of doctor.
This equivalence at the academic level of Doctor does not imply, under any circumstances, the validation, declaration of equivalence or recognition of any other foreign degree conferred on the student, nor the recognition by Spain of any level other than Doctor.
Submitted documents must be authenticated diplomatically or, when appropriate, by the Hague Convention apostille. Under current legislation for certified copies, the authentication or apostile must appear on the original document prior to making any copies to be certified. This requirement does not apply to documents issued by the authorities of member states of the European Union or signatories of the Agreement on the European Economic Area.