Response codes of the Collaborating Entity EECC or Financial Entity EEFF
When making a request for a direct debit through the AEAT payment gateway, the financial institution may reject the operation due to different circumstances (technical problems, errors in the data entered, incorrect identification, duplicate payment, etc.) and return the corresponding error messages.
These are responses generated by financial institutions ( EEFF ) or collaborators ( EECC ) and it is necessary to carry out the necessary checks and contact these entities to resolve the problem.
Alternatively, you can request the NRC directly from the bank by providing the payment details, use the online banking services they offer or process the charge to another account or to a different financial institution.