How can I consult CORE SEPA non-payments?

You can receive hard or digital copies. If you prefer, you can also consult them on the web, by clicking on Daily Operations > Accounts > Bill portfolio / Bad debts.

If you want to receive a digital copy, you can activate this option in  Files > Received Files > Activate file reception. You must choose the type of file, the NIF of the presenting client and the prefix (not that of the creditor). You will no longer receive it on paper and the branch will not be able to obtain a duplicate.