Error 403, SSL connection error, The page cannot be shown or Secure connection failed when accessing or signing a procedure on the internet

Error 403 - You do not have a certificate or electronic ID

When does error 403 appear?

Error 403 is an identification error. It occurs when accessing a procedure that requires identification with a certificate or electronic DNI and the internet browser does not detect any signature.
If you do not have an electronic certificate, this error code will appear when accessing a procedure that requires it.

The system will automatically offer the available options for accessing the procedure in question with electronic identification. If you only allow entry with a certificate or DNIe you will receive error 403. If the procedure allows Cl@ve or another type of identification, the necessary data will be requested to continue with the identification.

Error 403 will also appear when accessing, without having a certificate, "Register in Cl@ve with certificate or electronic DNI ". Remember that registration in Cl@ve can also be done online without a certificate, by video call or by requesting an invitation letter by accessing the "Register in Cl@ve" service. In-person registration is also possible at registry offices.

What is a digital certificate?

The certificate is an electronic signature that is installed in the browser to guarantee your identity on the Internet and allows you to carry out procedures from your own computer without having to travel (for example, access your tax data, submit your declarations electronically, make payments or request and collect certifications directly through the Tax Agency website).

The electronic certificate is not requested through the Tax Agency website but through the website of an issuing entity. 

The procedure for obtaining a certificate that allows you to identify yourself on the AEAT page may vary depending on the issuing entity. Likewise, in the event of any problems with the application or obtaining of the certificate, it is necessary to contact the corresponding issuing entity, since the requirements and circumstances may vary in each one. All issuing entities have support options and services that can be accessed from their websites.

How does the electronic DNI work?

The AEAT website supports identification and signature using the electronic DNI . To use it, you need certain pieces of hardware and software that can access the card's chip, and therefore access the certificates contained in it. In addition, the certificates must remain valid since they expire 24 months after the DNI is issued, if they are not renewed beforehand at one of the DNI Update Points located in the issuing offices, and know the PIN that protects access to the functionalities in the DNIe .

When accessing a web page option that requires an electronic certificate, the browser must request the PIN and then display the certificate store so that the appropriate one can be chosen (authentication or signature).