Sign with AutoFirma
Sign your bid's documents with the company certificate, from here: you choose the certificate once in AutoFirma and all of them are signed. The document does not pass through our server: it is signed on your computer.
PDF, the DEUC in XML, the Facturae or others, up to 25 MB each
How each document is signed
- PDF: the signature goes inside the PDF (PAdES), as seen by whoever opens it in their PDF reader or on the Plataforma.
- Facturae: XAdES signature with the e-invoice policy, the one FACe asks for.
- DEUC and other XML: XAdES signature with the XML inside (.xsig file).
- Everything else (Word, spreadsheets, ZIP…): CAdES signature with the document inside (.csig file). If the specifications ask for the document in PDF, convert it first: the envelope check does that and counts the pages.
What you need
AutoFirma installed (the Government's free application) and the company representative's certificate on the computer, on a card or on the DNIe. On a mobile phone, signing is done with the Cliente @firma móvil app: the data passes through our server encrypted with a key known only to your browser and the app, and they are deleted as soon as they are collected (or after five minutes).
After signing we tell you who signs and whether their certificate is qualified according to Spain's trusted list (only the public certificate goes to the server, not the document). The signature is made by AutoFirma, of the Ministerio para la Transformación Digital, with the official Cliente @firma script (EUPL 1.1 / GPL 2), which we serve untouched. Then, the envelope check checks that the signatures are still valid on the submission date.