This frequently asked question explains the process you must follow if your entity already has authorization from the State Tax Administration Agency (AEAT), but you want to revoke access to certain data.

The cancellation may affect one or several procedures.

When does this situation apply?

This situation applies when:

  • Your entity no longer needs to access certain AEAT data, or

  • Some procedure is no longer used or has become obsolete.

In these cases, you must notify the AEAT to process the corresponding cancellation.

Which form should I use?

To process the cancellation, you must use the AEAT's own form for canceling web services.

This form is the same for both tax and non-tax purposes.

You can download it from the website corresponding to the purpose of the procedure (tax or non-tax), in the "Forms, guides and models" section, accessible from the following links:



AEAT website for tax purposes

You must complete all sections of the form following the instructions indicated.

The form itself includes, at the end of the document, detailed instructions for filling in each field, which we recommend you follow to avoid errors or possible requests for corrections.

In this case, the form must clearly identify the procedures that you wish to cancel.

Important: This procedure does not affect the authorizations you already have in force or the authorized electronic seal certificate , which remain active.

How and where is the application submitted?

You will have to submit the form through the electronic registry of the AEAT headquarters, using the corresponding identification system:


Access to the register can be done in any of the following ways:

  • From the specific website according to the purpose of the procedure (tax or non-tax):

a) Tax purposes



AEAT website for tax purposes


b) Non-tax purposes



AEAT website for non-tax purposes


• Or, from the general catalog of procedures of the AEAT electronic headquarters, through the route: Inicio > Todas las gestiones > Otros servicios > Administraciones Públicas, where you can filter the procedures for tax and non-tax purposes:

a) Tax purposes


AEAT website for tax purposes

b) Non-tax purposes


AEAT website for non-tax purposes

In both cases, you will access the generic Electronic Registration form for document submission , in HTML format.



Example of generic form available in the electronic registry of the AEAT headquarters

This form:

  • The corresponding procedure and formalities are already automatically preset , depending on the selected purpose (ZA04 tax purposes or ZA05 non-tax purposes).

  • It allows you to attach the AEAT's own form to the procedure, completed and signed in PDF.

Therefore, it is not necessary to manually select the procedure or formality, as they are automatically incorporated when you access the AEAT's electronic office from the enabled links.

The operation of the generic electronic registration form is explained on the help page of the AEAT's electronic office.

Once the request has been registered:

  • An acknowledgement of receipt is generated with a Secure Verification Code (CSV).

  • You can consult the file on the AEAT's electronic office.

Amendments and requirements from the AEAT

If the AEAT detects that the application submitted is incomplete or requires any correction, it will notify you of the amendment requirement.
In this case, you must submit the amendment through the authorized procedure of the AEAT electronic office, within the period indicated in the request:
Respond to requests or submit documentation related to a document received from the AEAT


AEAT website for access to the procedure

If you need help on how to submit an amendment or respond to a request, you can consult the following frequently asked questions on the AEAT's electronic office:
How to respond to requests or submit documentation related to a document received from the AEAT

Official AEAT registration

The AEAT analyzes the communication and, if applicable, will process the cancellation of the indicated procedures , updating the current authorizations.

You will be notified by email, confirming that the cancellation has been effective.

From this moment on, you will no longer be able to access the data or services corresponding to the cancelled procedures. The remaining authorizations, if applicable, will continue to be active.

Recommendation: We recommend periodically reviewing current authorizations and canceling those that are no longer used or have become obsolete , to keep the system updated and avoid incidents.

Keep in mind that the AEAT periodically reviews and can revoke ex officio those that are not used.

Final reminder

  • Unsubscribing allows you to remove access to certain data or services that you no longer need.

  • You will have to process the cancellation with the AEAT, using the corresponding form.

  • The cancellation does not affect the rest of your current authorizations or the authorized electronic seal certificate, which remain active for the rest of the services.

Additional information