Prerequisites Spain

Requesting a signing certificate

To obtain an SII Electronic Certificate, the taxpayer must submit a request to the Agencia Estatal de Administración Tributaria (AEAT), Spain's State Tax Administration Agency. This certificate is tied to the taxpayer’s NIF (Número de Identificación Fiscal – Tax Identification Number) and is compatible with both the AEAT's Test and Production environments.

After successfully acquiring the certificate, it must be forwarded to the designated Retarus Implementation Engineer.