How the DGT's position has evolved
Current position
Businesses may choose between paper or electronic formats for the issuance of invoices. The chosen medium must guarantee the authenticity of origin, the integrity of the content, and legibility, allowing access to the Administration without delay. It is not necessary to keep paper copies of invoices received electronically or digitized.
The DGT's position remains constant in requiring the guarantee of authenticity, integrity, and legibility of invoices. Throughout the rulings, it has been specified that authenticity can be proven through any means of evidence admitted in Law, including management controls that create a reliable audit trail. The doctrine has integrated the validity of formats such as PDF and the possibility of dispensing with physical media through digitization.
Turning points
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It is established that certified digitization allows for dispensing with paper originals as long as authenticity, integrity, and legibility are guaranteed.
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It is confirmed that PDF invoices received by email are considered electronic invoices and that the use of a digital signature is not mandatory.
Analysis based on 27 of 28 rulings with a stated position. Updated 24 September 2026.