Signing the offer summary is equivalent to signing all the documents that make it up. Although in accordance with Article 140
of Law 9/2017, of 8 November, on Public Sector Contracts, the DEUC must also be signed.

Likewise, if the specifications require the presentation of originals or certified copies of the documents, these must be electronically signed and, if only the paper signed document is available, it should be securely scanned from the original paper document (copy authentic in electronic format made by a competent public employee). Otherwise, the board or contracting authority may require the corresponding amendment.