Good afternoon, you have all the steps to activate Direct Debt on this Link: https://www.nos.pt/particulares/ajuda/faturas-pagamentos/Pages/fatura-eletronica-debito-direto.aspx

@Sean Hedgley ,

After starting your session in the Área de Cliente click on "Gerir Serviço"
Select the option "Faturas e Pagamentos" and then click on "Débito Direto"
Click on “Ativar Débito Direto”
Enter your IBAN and click “Ativar Débito Direto” again to finish the activation process.

Remember that Your bank will not approve any direct debit if You do not provide the authorization form to the creditor NOS.

Sign it and send it via the e-mail form available in contacts or request another way to send it from the forum moderators.
 

You can follow the step-by-step with pictures available in the tópic Como aderir ao Débito Direto?

Welcome to Fórum NOS @Sean Hedgley, 

Olá @Jose Rodrigues e @C24XXXX201, 

@Sean Hedgley, the community gave a good help! If you have any further questions, speak with us. 

Thank you