https://www.epo.org/en/node/how-do-i-make-request

How do I make a request concerning multiple applications?

If you're transferring rights or wish to register or cancel a licence for a large number of applications, you can upload a CSV file listing the applications in question and make a single bulk request for them all.  

In MyEPO Portfolio, go to Applications and patents. Select Upload application list in the bottom left-hand corner to upload the CSV file.  

The file should contain one column only, listing the application numbers in the standard “EPyynnnnnn.d” format. If the format of the file is correct, you can then make the relevant selection from the Actions dropdown list.