Jul 2, 2026
Digitally signing a PDF is a practical alternative for anyone who wants to reduce costs related to printing, sending, and storing documents. See how to do it online.

One of the most common questions among people who work with documents, contracts, certificates, and files that require a signature is how to digitally sign a PDF. Digital signatures are an excellent alternative if you want to save time and reduce the costs of printing and sending these documents.
Read more about what a Digital Signature is.
Unlike a handwritten signature, a digital signature is difficult to forge because it uses a range of data beyond the signature itself, which can be verified by any signer.
The processes that help make the signature secure include data collection, email confirmation, IP address and geolocation, unique codes known as tokens, and electronic authentication.
When you digitally sign a PDF with Autentique, for example, all this data is recorded in each new document created and sent for signature. Brazilian Provisional Measure 2,200-2 of 2001, Law No. 14,063/2020, and Decree 8,539 of 2015 help form the legal basis applicable to electronic signatures in Brazil.
In the step-by-step guide below, you will see how easy and fast it is to sign your PDF without needing to download any software.
Follow these steps and, in just a few seconds, you will have your PDF document signed for free:
Done. Your signers will automatically receive your signature request by email, or by SMS or WhatsApp, and you will be notified as soon as they sign. If you are one of the signers, you can sign immediately.
You will be able to view your document on the platform, track the signature status, and download the document.
Still have questions? Read more about how to create your digital signature here.
“Can I sign all documents with Autentique?”
Well, almost all of them. There are some documents for which you still need to go to a notary office, such as deeds and certificates. However, practically all private documents can be signed with Autentique.
Here is a short list of the main documents you can digitally sign:
Digitally signing a PDF offers several advantages, such as:
Now that you know all about digital signatures, start putting them into practice: digitally sign a PDF with Autentique.

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