International students typically require an undergraduate degree, proof of English proficiency (or Spanish/Catalan depending on the course), a CV, motivation letter, transcripts, and occasionally a research proposal for postgraduate studies at the Open University of Catalonia (UOC). All documents must be officially translated and certified for Spanish universities. The procedure entails submitting an online application, paying fees, and possibly obtaining UNEDasiss certification for Spanish system equivalency; program-specific requirements may differ.