Frequently asked questions for suppliers

Supplier is understood to be the holder of a credit right pending collection arising from certain legal relationships with Local Entities, as well as the assignee to whom the right to collection has been transferred.

The platform will allow suppliers to view outstanding invoices and expressly accept payment through this procedure.

If the invoice information is correct, you can give your acceptance (individually or massively) for the collection of these invoices through ICO . This acceptance implies the waiver of the collection of interest, legal costs and other expenses. Additionally, a bank account associated with the invoice is required (accounts SEPA and not SEPA ) to receive your payment.

Yes, the power of attorney that the supplier must grant corresponds to procedure ZZ623 - Supplier Payment Acceptance Management (ACDGAE of 11-05-2026) which allows a third party to carry out this procedure on your behalf.

The power of attorney procedure can be carried out electronically using the electronic certificate (or Cl@ve , if you are a natural person and are registered in this service) of the provider from the Electronic Office, following the route: "Home", "Information and Procedures", "Collaborate with the Tax Agency", "Register Powers of Attorney", "Registration of Powers of Attorney through Electronic Identification".

Once inside, you must select "Registration of power for specific tax procedures" . Next, you will have to indicate the NIF of the representative and the expiration date of the power (by default it appears filled in with a margin of five years, which is the maximum allowed). Then select the procedure ZZ623 - Supplier Payment Acceptance Management (ACDGAE (from 11-05-2026) located within "Other services", "Regional and Local Funding", and the process continues.

Once the power of attorney has been granted, the attorney-in-fact will be able to access the system with their own electronic certificate or Cl@ve to manage payment acceptances electronically on behalf of the principal.

Access to the platform using an electronic certificate must be done using an X.509V3 electronic certificate issued by the FNMT or any other electronic certificate accepted by the AEAT in accordance with the provisions of Order HAP/800/2014, of May 9. Below are the types of certificates supported:

• Electronic certificate for a natural person.

• Electronic certificate of representative of a legal entity.

Yes, Cl@ve is one of the supported identification types.

You can register in the systemKey on the page of the AEAT, using the APP Key by video identification and directly at the registration offices, if you decide to go to your Administration or Delegation, request an appointment.