SUPPORT JOSEPHINE service is available on weekdays from 8am to 5pm (CET/CEST).

čeština tel.(CZ): +420 255 707 010 čeština tel.(M): +420 597 587 111

slovenčina tel.(SK): +421 220 255 999 polski tel.(PL): +48 222 139 900

tel.(HR): +385 800 805 917 english tel.(EU): +420 597 587 171

Email address:

JOSEPHINE – Software Technical Requirements

Your computer must be connected to the internet. For trouble-free participation in the JOSEPHINE system for electronic bidding and electronic communications in a public tender with the mandatory use of an electronic signature you need to have the web browser Microsoft Internet Explorer (version 11.0 or higher) installed on your computer (, which can also be used for your own work.

If you are bidding or using electronic communications in a public tender where no mandatory electronic signature is required, Mozilla Firefox (version 13.0 or higher - and Google Chrome ( may also be used.

The current version of Java must be installed on your computer. It is necessary for the proper operation of JOSEPHINE if data has to be signed off with an electronic signature. In a public tender where the use of an electronic signature is not mandatory, then Java need not be installed. Java is available at and is free to download.

Whichever browser is being used it is necessary to have javascript allowed and cookies enabled. Instructions for enabling cookies can be found at You can also carry out a browser test, which can be found on this page.

For public tenders where the use of an electronic signature is mandatory, the participant must have a valid electronic signature certified in accordance with the requirements of EU regulation № 910/2014 and the relevant national legislation. Certified electronic signatures are issued by qualified service providers in each EU Member State.

The JOSEPHINE system allows each participant to attach electronic documents (files) to their data messages. For unencrypted communications, the total maximum data size is limited to 500 MB, while for encrypted communications it is 300 MB. The total maximum data size means the total volume of a participant’s data pertaining to the task being performed.