Qualified Seal of Documents and Electronic Invoicing

Public Procurement

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20% discount on Thawte SSL Certificates

Offer valid until 19/02/2023

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Adopt the new electronic invoice!

Mandatory for public administration.

Comply with new legislation and protect the environment with a simple low cost solution.

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Save time, money and be environmentally friendly

Guarantee the security of your organization documents with our eSeal solution.

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From governments to small and large companies across Europe

We provide critical e-signature solutions to support remote working

148€ + VAT
130€ + VAT
40€ + VAT
certificado qualificado de faturacao eletronica
130€ 49€ + VAT
Selos Temporais
84€ + VAT
95€ 76€ + VAT




Qual Escolher?

You do not know what the most appropriate type of certificate for yourself or your company?

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Express Service


Do you have urgency in issuing your Qualified Digital Certificate?

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Need Technical Support? To better serve you, we offer a ticket System.

Support Center

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Featured products

Electronic Invoicing

Electronic Invoicing

Ensures compliance with e-invoicing law, allowing you to easily sign and share your invoices.


Digital Signature Platform

Adopt electronic signatures with customers and partners with full legal value and great user experience.


Transversal solutions for all areas

We certify throughout Europe and Brazil

Mapa DigitalSign

Last News

Notícia 25 01 2023

Now it’s easy to validate a digital signature

C 25 January 2023

Receiving an electronically signed document and not being certain about the validity of your signature is a problem that we at DigitalSign see happening on a daily basis...

Notícia 23 01 2023

eIDAS Certification - Renewal

C 23 January 2023

DIGITALSIGN – Digital Certification, S.A., Certifying Entity (EC) duly accredited by the National Security Authority, has renewed...

Notícia 25 11 2022

WORKSHOP “Cybercrime and Secure Digital Transformation”

C 25 November 2022

DigitalSign in partnership with the Polícia Judiciária (Criminal Police of Portugal) held a workshop on the theme: “Cybercrime and Secure Digital Transformation”.

Notícia 30 09 2022

Environmental footprint

C 30 September 2022

We want to leave our footprint on the world, but not through our packaging....