First time only – register to my.euroclear.com and request access to the Authorised signatories app:
1. go to my.euroclear.com
2. click on Or create a new user profile in the middle of your screen
3. complete the fields as requested
4. make sure that you do not forget to tick the Authorised signatories box in the ‘Request access for’ section
5. click on Register
Once your registration has been validated, you will a receive a confirmation email. You can then proceed to log in.