Digital certification: what is it and what is the relationship with issuing an invoice?

The Electronic Invoice (NF-e) was created in 2006 and is the digital version of this relevant document issued by companies. It emerged to facilitate the various segments that need this registration, in addition to formalizing the purchase of products or services.

To issue invoices safely, it is possible to count on tax certification. This is a tool that helps companies and individuals to carry out various activities. Thus, knowing it will allow you to discover the advantages of having this online validation solution.

In this content, you will understand what digital certification is and what are its types. Read on!

What is tax certification?

The tax certification acts as an electronic identification for legal or natural persons. Therefore, it can be associated with the applicant’s CNPJ or CPF. In practice, this tool emerged to support the online validation of documents transmitted over the internet with integrity and security.

Generally, the document is used to prove tax transaction information, such as contracts and issuing invoices. Through the digital certificate, companies can stay up to date with the Government, for example.

This is because it enables different tax transactions to be carried out, such as proofs and declarations that must be made to the Federal Revenue Service and other bodies. Regarding the security of operations, the tool uses state-of-the-art technology, containing a public key and a private key.

These keys are responsible for encrypting the certificate data. The private key presents the sender’s identity, while the public key is used for the receiver to have access to the information, decoding it.

In this way, the use of the digital certificate originates a file with the signature of the legal or natural person to which it belongs.

What is this document for?

Now that you’ve learned what a digital certificate is, it’s time to understand what this tool is for. In general, it has the function of digitally signing documents and having access to restricted electronic systems, especially from public bodies on the internet.

Among them are:

● The National Social Security Institute (INSS);

● The Federal Revenue, through the e-CAC portal;

● Boards of trade, states and the Federal District.

The NF-e certification, specifically, has different types, all of which fit the different needs of the business. It can be assigned to any employee, allowing the entrepreneur to appoint the person responsible for issuing invoices without having to share the company’s e-CNPJ and password.

What are the types of electronic invoices?

The electronic invoice is the digital document issued and stored electronically by the business. It is responsible for registering and proving the purchase and sale of products or the provision of services.

There are different types of electronic invoices — and each one has specific functions. See what they are!

Separate Electronic Invoice (NFA-e)

The Single Electronic Invoice (NFA-e) allows you to issue tax documents over the internet to register the commercial operation. In this case, it is intended for those who issue few invoices and do not have a digital certificate .

Electronic Consumer Invoice (NFC-e)

The Electronic Consumer Invoice (NFC-e) is the digital version of the invoice used in retail. With this model, it is possible to consult which invoices were generated, avoiding the waste of paper with each sale made.

Electronic Service Invoice (NFS-e)

The Electronic Service Invoice (NFS-e) is the type used to formalize the provision of services. It is simpler than the NF-e because it does not have many variations.

What are the benefits of the NF-e digital certificate?

In general, obtaining a digital certificate offers several advantages for companies , reducing the bureaucracy of processes. It is worth mentioning that the procedure takes place through a safe and practical system. The NF-e digital certificate offers specific advantages for companies.

Discover the main ones!


This type of certificate uses cryptographic keys to confirm identity and protect the transmission of information in virtual environments. With this, it is possible to ensure the fiscal and legal validity of electronic invoices.


The tool allows access to electronic systems for rectifying, issuing and canceling electronic invoices. It can also retrieve information about authorization to use or reject banknotes, which avoids time-consuming bureaucratic processes.

Economy of inputs

The digital certificate avoids the use of ink and paper for printing checkbooks by ensuring the integrity of the information present in the electronic invoices. In addition to saving inputs, the measure promotes more sustainability.

What are the types of NF-e certification?

Another important point to consider is that there are several types of NF-e certification — and each one is indicated for a different purpose. Thus, it is essential to know them so that you can choose the ideal model for your business.

Check out the main types on the market!

Type A

Also known as digital signature, type A is the most used in the market. It identifies the issuer’s signature and proves that there were no changes to the document after validation.

Due to its versatility, this model is suitable for self-employed or liberal professionals from different areas who need to use digital certification. This classification is further subdivided between A1 and A3 certificate.

The first must be stored on a device, such as a tablet, cell phone or computer. Validity is about one year. The A3 digital certificate is stored in the cloud and may have a longer validity.

Type T

Also called a time stamp, type T certification attests when a digital document was issued, making clear the time and date on which certain information came into existence.

As this data could be altered to benefit one of the parties, this type uses a certifying third party to certify the exact moment the document was issued.

Type S

The type S certificate is used to guarantee secrecy of transactions, which means that only specific people have access to the data. With it, you can encrypt the information in a document.

This way, it can only be accessed with a digital certificate authorized to open the file. Therefore, the S-type is very useful for companies that need to digitally protect valuable information.