For TicketBAI compliance, a device certificate is automatically allocated during the creation of a Signer in SIGN ES, unless you want to provide your own external device certificate. This certificate can be retrieved from the API call response for the registration.
The process for registering certificates differs between provinces:
In Gipuzkoa, once the device is issuing files in the name of the taxpayer, the device certificate will be available for approval within the system. This approval must be completed by the taxpayer within one month via Tramiteak Online.
In Araba, the registration of the device certificate must be done before the device begins issuing files in the taxpayer's name on the following website: Registro de certificados de dispositivo.
Similarly, in Bizkaia, the device certificate needs to be registered prior to the device issuing files in the taxpayer's name: https://ataria.ebizkaia.eus/es/catalogo-de-tramites-y-servicios?procID=1740.