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Legally valid online signing of documents with the Autenticação.gov citizen card
Qualified digital signatures made easy: Use your digital proof of identity to sign documents securely and with legally binding effect.
Portrait
Authenticação.gov's resources, such as the Citizen Card and the Digital Mobile Key (CMD), allow the use of services and access to portals of various public and private entities, in the areas of banking, telecommunications, energy, health and tourism, among others, as well as the digital signature of documents.
Frequently asked questions
Use your existing qualified signature directly in sproof sign
We have integrated the most important signature providers
We are constantly updating the eID Hub with new providers and authentication methods so that you can obtain legally valid digital signatures as easily as possible - at no extra cost.
