EUIPO has just become a partipant member of the WIPO Digital Access Service (WIPO DAS) as an Office of Second Filing. Last July, became also Office of First Filing.
Now applicants are allowed e-filings to submit the documents required for priority claims by way of a reference to a WIPO DAS access code provided by the Office of First Filing.
To read more, please refer to EUIPO's website.
Guidelines are also accesible through the following link.