Signa Desktop

Any user can install and use the Signa Desktop application on their Windows workstation free of charge.

When using Signa Desktop, the following fees may apply for signing with a qualified electronic signature and adding a qualified time stamp (prices are listed excluding VAT):

• Creating a single signature using Mobile-ID or Smart-ID – 0.20 EUR.
• Creating a single signature using LT ID – 0.15 EUR.
• Creating a single signature using a stationary electronic signature and SimplySign – 0.00 EUR.
• One qualified electronic time stamp – 0.04 EUR.

If the monthly cost of services is less than 1 EUR (excluding VAT), a VAT invoice will not be issued.

For more information on the charging of Signa signing services, please follow this link.

Signa Desktop can be installed and used by anyone who wishes to create, sign, and/or verify official electronic documents of the ADOC specification. The program can be used by both individuals and employees of companies, institutions, and organizations.

Every user specifies on his own behalf in whose name a specific ADOC document is being created, to whom it is addressed, and the details of the person signing it.

A qualified time stamp can be applied to every qualified electronic signature created in Signa Desktop. Each time a user signs a document, he or she indicates whether a time stamp should be added to the signature. When signing documents with a qualified electronic signature, we recommend always adding a time stamp to confirm the time of signing.

If necessary, Signa Desktop allows you to apply time stamps to electronic signatures in ADOC documents created previously in Signa Desktop or other systems, as well as to prepare electronic signatures for long-term validity (by upgrading the signature format to XAdES X-L).

Signing and time-stamping in the Signa Desktop are permitted only for users registered to use Signa signing services. A user may be either a natural person or a legal entity (a company, institution, or organization).

Registration for the use of service is available at this address: https://signa.mitsoft.lt/mss-registration/en

The access key is displayed in the final step of the registration wizard — you must note it down and enter it later when prompted to sign or add a time stamp.

The access key that you are asked to provide during the signing process is displayed in the final step of the registration wizard, after you have signed the Terms of Service. If you no longer have it, you can obtain a new access key as follows:

1. Go to: https://signa.mitsoft.lt/billing/login.xhtml?lang=en

2. Select "Contracts" from the menu on the left. Click the "Refresh" link at the bottom of the page to update the key. A new key should be displayed. Save it.

3. Wait 2–3 minutes and try using the new key.

Don’t forget to enter the new access key the next time you sign in to the Signa Desktop. You can do this by selecting “Change” in the signing data section, if it has been saved.

If you want to sign documents using the Signa Desktop and receive invoices for Signa signing services on behalf of a company or organization, you must register that company or organization to use Signa services. You can register at:  https://signa.mitsoft.lt/mss-registration/en 

When registering, you must indicate that you are registering a company or organization and provide the requested company information. The access key displayed at the end of the registration process corresponds to this registration. You must save this key and use it later when signing documents in the Signa Desktop. The access key you receive can be used by all employees of the company or organization; there is no need for each person to register separately. 

If, even after registering a company or organization, invoices are issued to you personally as an individual, this means that you are also registered as an individual, and when signing, you are using an access key corresponding to your individual registration rather than the organization’s registration. In the Signa Desktop settings, change the access key and enter the key assigned to your organization.

The Signa Desktop application installed on the user's workstation verifies the certificates used in ADOC document e-signatures using information available in the Windows system regarding certificates from trusted certification authorities. If the certificates from the required authorities are not included in the system’s list of trusted certificates, error messages regarding an untrusted certificate will be displayed.

You can find a list of certificates from certification and other authorities that are the most commonly used in Lithuania at the following address: https://signa.mitsoft.lt/info/signa-certs-en.html

The page also provides instructions on how to install the certificates in the Windows Certificate Store. 

You are not required to install all certificates from the provided list at once. If you receive an "untrusted certificate" error while verifying an ADOC document with the Signa Desktop program, you can locate the corresponding certificate in the provided list using the subject name indicated in the error message and install it.

After installing new certificates on a Windows system, you must restart the Signa Desktop.